The important thing is to certify that your goggles can indeed protect your eyes. This can either be from certification organizations or reputable manufacturers, or by measuring the filters directly using a meter -- self-certification. Otherwise you're just taking the seller's word for protection. "CE Certified" also means nothing, as it's probably for ergonomics or impact.
As for IR filtered goggles for DPSS green, I'm on the fence. A decent amount of the IR from a DPSS laser is still collimated; however, the amount will depend highly on the laser you're using. Cheapo lasers will have lots of IR because they're often not filtered. Higher end lasers will have extremely small amounts of IR. I'm on the fence because goggles that filter light for both green and IR usually have very poor VLT -- the light that does get transmitted -- and may also have weaker protection from the green to compensate.
I've got two pair of such all-purpose IR + green protection goggles and never use them because it's hard to see what I'm doing. Instead I use my ARG goggles which provide extremely good green protection, even if it has minimal IR protection. Most of my DPSS greens are well-filtered for IR though.
Remember that the first most important thing about goggles is that you want to wear them. If they're uncomfortable, get in the way of your work, or break easily, they're useless. The goggles I've gotten from OEM or on eBay are comfortable, provide certified protection, and are well made. A very sound investment.
Finally, when it comes to eBay, keep an eye out for used goggles. Often you can find a nice pair of name-brand, certified argon-protection goggles (ARG, orange filters) for pretty cheap. I've even gotten some nice goggles that protect against red, etc. One time I even bought a set of 7 or something high-quality goggles of all different types of protection (even an OD30+) for about $90. Keep an eye out!
