Ok, first of all, every day, I see threads on "what laser should I buy", "what power green laser should I get", etc. So I've decided to make a guide to answer all of those questions. Then mabye we will have far less of those threads popping up all over the place!

The first section of this guide will be to answer the most common questions people post, and the second part will be a list of the most affordable/most expensive lasers.

FAQs

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Q: What is the best laser for it's price?

Scroll down to list.
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Q: How much power is bad for my eyes?

5mW is the "limit" for taking a direct hit to the eye. This is because a laser above 5mW can cause damge before the blink reflex kicks in, shutting out the beam. This is also why the FDA doesn't let lasers above 5mW get into the US. So kids don't blind themselfs. The usual maximum for looking a the dot of the laser is 30mW, although I definately wouldn't stare at a dot of that power for long. There is no limit for looking at the beam, so you point point virtually any laser at the sky.
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Q: What is the maximum power for different purposes (eg. burning)?

Usually 5-30mW is used for pointing around, 31-75mW is used for beam pointing, and 95+mW for burning. This is also because most lasers 95+mW are "portable laser" style. If you buy a pen style above 100mW, be aware that it will need a duty cycle (due to terrible heat dissipation in the head.)
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Q: Are you SURE you can't burn with ~60mW?

Yes you could, but it would require an additional lens (aka-magnifying glass).
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Q: How does the beam visability vary from laser to laser?

For a visable beam, 5mW is enough at night, and ~35 in a lit room. 50mW has a very visable green line at night, and anything above that appears extremely bright in low light conditions.
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Q: Do I need an IR filter?

People have argued over this for a long time, so I won't try to start any arguements here. In my opinion, no, you don't NEED an IR filter. As you probably already know, the IR surrounds the green, with a much bigger dot. But there really isn't a safety issue, as the IR stays collimated enough. The only thing that could go wrong is if you point the laser near someone's head (Which you should NEVER do!!!). The only real reason for getting one is to get more accurate readings on an LPM.
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Q: How does the FDA decide to let the laser through or not?

The FDA does not allow lasers above 5mW that aren't FDA approved. FDA approval means having a power key, secondary interlock key, safety shutter, two second delay, and warning light. Note that people order illegal lasers all the time, and I have never once heard of one getting caught. The chance is very slim, and it really only affects companies like Dealextreme, who won't even let you order them.
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Q: Can I pot mod a low-powered laser into a burner?

NO. Don't even try, don't even think about it. Most pot mods result in lower power, not higher. The only way it will work is if you have enough time to burn one match, before it dies. I didn't say you couldn't do it-people have gotten 30-40mW for a 5mW pointer-I just said you can't get it high enough to burn. Either way, do so at your own risk.
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Q: Then what about this video?

I always see this video popping up, and people thinking it's an actual mod. It isn't. All that guy did was add fog to the the room, which can make any laser extremely bright.
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Okay, I think I've covered most common questions (PM me if I haven't). On to the list!

The List

First, the cheap list.

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DealExtreme (DX)

Dealextreme (DX) sells a lot of lasers. A lot. Mabye even hundreds... Most of their laser pens are okay quality. The 5mW's are the only ones they will allow into the US. The outputs are up to spec (sometimes over) until you get to 50mW-Their 100mW pen is nowhere near 100mW! The Romisen flashlight style 30mW's are also good quality.

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0-like

O-like is a trusted company. I would reccomend it most out of all the cheap companies. The lasers are almost always overspec, and never under. On the slight chance that they are, the customer service is the BEST, and you'll get sent a new one.

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Rayfoss

Rayfoss is almost the exact same site as O-like (site layout, products). The customer service is hard to beat, and the products are up to spec (just make sure you read carefully to see what the ACTUAL specs are). Rayfoss seems to specialize in "torch" hosts, which are waterproof and usually good quality.

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LEDshoppe

LEDshoppe sells pretty good pens. Most notible are the 5mW's (extremely overspec sometimes), and the 50mW laser. The 50mW laser is only $24, which is the best mW per $ on the market! People living in the US have been buying the 5mW lasers as an alternative to the DX lasers, which stoped shipping do to the FDA.

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Laserlands

Laserlands is a risky company. They look a lot like rayfoss, and have similar products. The lasers usually seem to be up to spec, but I have seen the occasional "bad" review, so I would be careful buying from them.

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BudgetGadgets

Budgetgadgets sells only a few good lasers. The 20/30mW "stars projecter", and the 30/50mW pen flashlight. The other lasers could be good or bad, but are not very consistant so I wouldn't recommend them.

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Kaidomain

Kaidomain is pretty much DX; the only difference is that some lasers ship to the US, and some don't.

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FocalPrice
Quality China Goods

Focalprice and QCG are pretty much the same thing. They sell a variety of laser pointers, but I wouldn't trust any of them, mostly because they vary in output so much. You could get a good one, you could get a bad one. The risk is up to you.

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The Good

Alright, now to the good sites.

Laserglow

Laserglow sells 3 different green lasers. Their supplier is CNI, so the pens have the typical "CNI pen" look.
1.-The Lyra series. This is the best 5mW pointer you can buy! It's incredibly stable, has great divergence, and is made of anodized aluminum (will not scratch off).
2.-The Aries. It's a reliable portable laser. Not much else to say... Again, from CNI, so the quality is top-notch.
3.-The Hercules. It's pretty much different from any laser out there (using D sized batteries). And I'm pretty sure it's the highest powered portable laser you can buy.

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NOVAlasers

Nova Lasers is probably the best quality you can buy. The X-series is illegal in the US, but NOVA guarantees the laser's arrival, so they will send you another one if it gets taken by customs. The Alpha is great, ALWAYS overspec, and it still keeps the "portable" look, while staying relatively small. If you're looking for a first burner, the Alpha100 is the laser for you.

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Optotronics

Optotronics is a great company, with great customer service. They just recently started selling pointers. The lasers are overspec, and optics and other goodies are included with the RPL's IR filters are also least expensive there, if you think you need one.

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Dragon Lasers

Dragon Lasers sells a pretty good selection of lasers. The quality is good, and they are overspec. DL also sells the cheapest safety goggles.

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SKYlasers

SkyLasers probably has the lowest quality/consistency of the expensive companies. I've heard mixed reviews from them, but they do have the best prices (with guaranteed output), plus a six month warranty.

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The BAD

These are the sites you should NEVER buy from. They're underspec, have questionable quality, and are just plain scammers.

Wicked Lasers
WarnLasers
TechLasers
BOBLaser
BestOfferBuy
Laser DIY
Laserto
ShopHDE

eBay/amazon are sites I can't really place. Some sellers are good, and some are scammers. You'll really just have to research them and decide for yourself. 5mW lasers are almost always up to spec, and more often then not overspec. Ebay is also the best place to buy the WickedLasers Core (which is the only good laser WL sells).
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And that's the end. I hope this guide helped!

Great guide! +1

To the list of "bad" sites, add Boblaser. Also, make a statement that if it has not been mentioned on this list, it is probably bad...scam laser sites are everywhere.

-Mark

Thanks! I'll do that, although I wasn't going to put on suppliers...

I'm hoping it will get stickified. ;D

EDIT: Added Boblaser.

Bestofferbuy - BAD
-Greg

there is a little error....you say that aries is similar to nova.. but are different. aries uses a 1200mw pump diode at 1000mw.... NOVA uses a 2000mw pump diode. nova starts from 200mw true green and aries arrives at max 225mw.
the 200mw aries is 889$...200mw nova 799$. laserglow is not cheaper than nova.. but it's the most expensive company specially from 20mw to 200mw!
i gave you a rep+

You might want to add that the 30/50mW laser is also available in 100mW. Speaking of which, I ordered the 100mW and will be making a review of it once it arrives.

Great guide! I should have read this when I bought my first laser!

-Jakob

Laserglow sells 3 different green lasers. Their supplier is CNI, so the pens have the typical "CNI pen" look.
1.-The Lyra series. This is the best 5mW pointer you can buy! It's incredibly stable, has great divergence, and is made of anodized aluminum (will not scratch off).
2.-The Aries. It's a reliable portable laser. Not much else to say... Again, from CNI, so the quality is top-notch. It's the same thing as a Novalasers NOVA, but cheaper.
3.-The Hercules. It's a higher powered Aries. And I'm pretty sure it's the highest powered portable laser you can buy.

Just to clarify, the Hercules is not at all a pen style (almost a full foot and a half long, over 5lbs) and is an entirely different design than anything else on the market. The Herc features no duty cycle due to internal forced air fan cooling, has external power inputs, and also is set up for TTL modulation, not to mention they use a full 2.5w pump diode and are designed to allow the user to adjust the output to their needs (meaning if you want your herc 400 to only put out 200mW for a demonstration, etc you can easily dial it down, back up, etc)...

Laserglow is unique also in that they test the output of the Aires and Herc series of lasers over time, and use the actual "settled" power of the laser as it's rating (for example, my herc 350 actually peaks and holds at 500+mW for awhile, then settles to around 370-380mW, hence them selling it as a 350 when almost anyone else would market it as a half-watt laser).

If you have a few grand laying around, Laserglow can custom order the Herc for you well in excess of 1/2 watt - but for a mere $2K, the Herc 350 is an incredible piece of engineering!

BTW, here it is next to a "pen-style" laser for comparison

There is only one exception to the "bad" list, which is the wicked lasers "CORE" 5mW pointer. I´ve heard good things about it and as my signature states I even do own one of my own, which I am very happy with. You should, however, not buy from WickedLasers directly, but rather from the redistributor "guitmath" on ebay - that´s where I got mine:

http://cgi.ebay.com/Wicked-Lasers-5m...3A1%7C294%3A50

I didn't say the Hercules was a pen style. At least I couldn't find it...

Something must have gone wrong here... I was writing this really late at night. ;D I just got rid of it.

That's exactly the reason I didn't put it up. It hadn't been reviewed yet. This guide is mostly for beginers, and I'd hate to point them in the wrong direction if the laser ends up being a bad deal. I'll keep an eye out for the review.

Everything fixed.

You should also include that the Novalaser NOVA series is out of stock.

Ahh smart. Well I'll be doing a review in 8-13 days when I get it.

-Jakob

[quote=pianoman2011]I'm glad that I didn't read this buying guide first. Otherwise I wouldn't have bothered to get three VERY nice 5mW Chinese lasers for less than $9 each, shipping was free, from eBay. I gave one away and kept 2. All pot-modded to get a decent 50mW (approx.) output. They have no problems starting a match when using a magnifying glass. But I suspect that they have strong IR filters, because the projected dot is much much much too bright to look at on most any surface. The beams are all clearly visible in a day-lit room with partial sunlight streaming in. One of them is working nicely in TEM11 mode for a little extra power. They've been running fine for a month this way. And at that price? I can buy another 10 and still get the same amount of laser out of them that other companies would sell a comparable product for just 1 laser.

That "buyer's guide" should be prefaced with a huge "IMHO" header. It's very misleading and reads like some clique of companies that everyone here wants to support, for who knows what reason.

Hint for eBay Chinese laser buyers: When getting the 5mW ones from China, they are sealed up really tight inside, but you can still "wiggle" the end cap off with a strong grip, to easily focus them a little tighter by turning the lens element. I got all of mine down to a 1.1 mRad divergence with a little focusing. Then look inside the battery contact, where the spring is on the back of the laser module Take out the little foam gasket surrounding the spring. To one side of the circuit board, next to the push-button switch, you'll see the edge of a little flat pancake of metal. That's the potentiometer you need to adjust. Since they can't be taken apart easily, it's best to measure the distance of this pot from the barrel edge, using a toothpick or something, and then approximate where to carefully drill a small hole directly above that pot. Then use a jeweler's screwdriver to turn it slowly counter-clockwise until you feel it's as bright as you need. Don't go overboard, they crank up pretty high with just a slight turn. I wouldn't turn it brighter than what I've already described what mine do (beam visible in sun-lit room), to keep them functional for a long long time. Cover up the hole that you drilled with the little holographic "QC Passed" sticker that's on the barrel end. Then it looks like it still came right from the store that way.

Um... You said you bought 3 nice 5mW lasers from eBay so this guide is bad... he only said eBay is a bad place to buy LASERS OVER 5mW, not that the 5mW ones are bad. Read correctly before you insult his guide.

-Jakob

WTF does this mean.... :-/ you can't see IR anyway and I highly doubt that a $9.00 Green
Laser has an IR Filter... 8-)

Jerry

Um... You said you bought 3 nice 5mW lasers from eBay so this guide is bad... he only said eBay is a bad place to buy LASERS OVER 5mW, not that the 5mW ones are bad. Read correctly before you insult his guide.

-Jakob[/quote]

And if you read the beggining, you also would have seen:

^Great guide, random.. My only input would be that I think you should remove ebay from your list of bad places to buy green lasers and other laser-related goods. There are a great many awesome deals and awesome sellers that can be found there. People should just look at feedback before they decide who to buy from. Ebay is just too good a source of great laser stuff to be called a bad place to buy from.

Thanks, I see what you mean. I'll take it off the list. But I hope people are aware that most people who write the Ebay feedback don't have an LMP, and a first time laser buyer could easily think that a 100mW laser is 200mW...

The thread has been officially re-done for the VB format.
now it doesn't look terrible any more!

ebay is a good place to buy bad lasers.
i did buy one of these ebay lasers, a 100mw. it was actualy only a 70mw lol.
it seemed like a nice laser until it STOPPED working :X
idk, maybe there are a few good 5mw lasers, but i will stick with the good brands

I belive that. just look at my sig...

ha ha ha. so true. u can get alot of mW out of a crummy ir diode and have bad beam divergence.
whatev tho

hey, i'm currently thinking about buying a 5MW green from ebay. Before you say "its going to be bad quality" i've made sure it's good enough lol. I'm not saying that eBay is good for buying lasers though, I'm sure, as has already been said, that Ebay isn't that great for buying lasers over 5mW. The only reason I'm buying from eBay is due to the annoying newish laws in Australia: all handheld lasers greater than 1mW are banned
Hopefully it will get through
Does anyone here live in Australia and have gotten a green laser through customs? Also, I've heard that some people have had theirs seized and then received a letter saying they've now got a record; is this true? Lol one of my friends actually ordered a few 100mW green lasers and only just found out about the laws. Doubt they will get through though haha. So does anyone know if there are any fines/records associated with having your lasers seized in customs in Australia? Thanks

Great guide, dude!

Well i dont know about other WickedLasers, but the CORE is a good laser

The WL Core is probably the only Ebay laser I would recommend, but if you find another good one, go for it! Actually, the Core and Lyra are probably the only two 5mW lasers I would recommend...