What I've done in the past is look for cheap certified used goggles on eBay. Not the ones that are sold out of China, but some of the surplus ones that come from time to time. Sometimes you'll find some really nice ones for pretty cheap, for example ones that shield against Argon lasers, which often makes them useful for protection against blue and green lasers.
Be aware though: sometimes these goggles will cost a bit. They may be cheaper than brand new, but they still cost a decent amount.
For example,
goggles like these, have very high protection for ARG (argon) type lasers. What you do is look in the pictures to see what their ratings are.
Or some like
these.
Search for "laser safety goggles" and then sort by price, high to low. Scroll down to the $20-70 area.
I realize these are more expensive than the ones listed before this post, and the shipping adds to the cost, but they're good usually quality. Brands like Glendale are often around and are good quality as long as they meet the ratings you need.
I've probably spent as much on working lasers as I have on eye protection. It's serious stuff. You probably only need two sets of goggles: those that cover 405nm to 532nm (as far as visible lasers are concerned) and those that cover 635nm to 660nm.
If you're going to get one pair of goggles and don't mind spending ~$100, you can get these
certified goggles from Aixiz ($85 + ~$15 shipping). They cover blue and green, and are easy to use. I've got a pair (from a different distributor) and they're really handy.