What about Retro Revival? Or...Power House? Working off of one of winmark's ideas, what about Round Two? Since it's playing the game again...you see...
Hm. Oh, what about "The Old School Shop" or "Old School Shop" or simply "Old School". Or, "Classic Collection" or...huh, I don't know why I'm stuck on alliteration with these names.
If he's selling retro stuff, he should also make sure he's got ways of testing it, or at least get the more common stuff so he can test that, like SNES, NES, Genesis, Xbox 360, etc. Or at least has the gear to clean it up really good. There's a place near to me named Game Play and I've bought games that were too darn scratched up or non-working that a simple play test in a PlayStation or Genesis would've prevented. Besides, saying that all your stuff is tested looks good, at least to me, since that says that for sure it works.
Good luck ^_^