Rayfoss 20mw 405nm Laser pen. Are they any good?

I am tempted to buy one of these:

www.rayfoss.com

They seem really inexpensive and I wanted to know if anyone has bought one before. At only $18 it seems like it might break in the first couple minutes.

If you are going for a cheap 405nm Pen style, go for ebay. There is a seller who sells them for 10 bucks, and they are almost ALWAYS overspec. They advertise as 5mW but most people find theirs to be much higher, many being 50mW or more!

On another note, I have had great dealings with Rayfoss and their customer support is the best I have seen.

HERE is the link to an ebay seller people buy from....the purple pen laser is now only 8.88!

This is probably the other guys roommate selling them cheaper. 5mw Blue Purple Laser Pointer For Xmas Gift Teaching US - eBay (item 110606494649 end time Dec-02-10 05:00:07 PST)

elite ares said:

This is probably the other guys roommate selling them cheaper. 5mw Blue Purple Laser Pointer For Xmas Gift Teaching US - eBay (item 110606494649 end time Dec-02-10 05:00:07 PST)

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I have bought from this seller. I paid for 3 and received 4. They shipped from the US.. Louisiana if I'm not mistaken. All 4 work and are definitely overspec. I don't have a LPM but I'd estimate ~50mW like wannaburnstuff and others have suggested. I'd estimate that I have used one of them around 60-70 minutes so far and I'm only on the second set of batteries. I highly recommend this seller.