You mean when they got rid of original game boy games? I remember that. I wouldn't trust a big store with retro games, they're all youngsters who wouldn't know what to do with the inventory. Besides, I live near some good, trustworthy, retro game stores, so I don't need GameStop.
Yes, if they had games I wanted at a price I was willing to pay. It's closer to me than Flea World, but I doubt they'd have nearly as much or have it as cheap.