Someone besides me may chime in with the best deal, BUT I know this much- find glasses that ABSORB the laser light rather than REFLECT it- Reasons: The reflective type are just coated, and if the coating gets scratched, the laser energy can find it's way thru the scratch-- I have 3 pair of absorption style, 2 have dark blue lenses, the other has green lenses, they're a little darkish but not bad. The blue's are quite dark, nice for actually watching the laser work since the working beam is about a lumen and a half less than arc-welding brightness - but they're SO dark that watching is all they're good for, you can't see squat otherwise, so wearing while changing parts frequently doesn't work for me. And one other thing about the blue color, they render all red lasers invisible, so you can't see your red pointers while wearing them. But they're good insurance for bystanders. The green's are still dark enough to make it hard to see between parts changes, but at least I can see the red laser.
According to the ads, these are both absortion style, and probably most over $50 will be. I KNOW the green ones are, I lasered one of the lenses as a test. If you test, aim for the edge of the lens, I hit the middle... oops
-note that the green lenses themselves are etched with the laser bandwidth they protect, the blue's have the frames etched. And I haven't tested the blue ones with the laser, I'm just assuming they work...
lz1.jpglz2.jpg
--both of these are in the $55 range on ebay right now-
Someone awhile back pointed out where to buy some nearly clear versions that were effective and weren't too expensive.