Yeah, we just happened upon it. I was surprised to see so many Lynx, TG16, and NGPC games...though I think I manly bought books at the time. Also it's not far from Game Trader, a pretty cool local store.
Ah, the one in St. Charles? That's a good place to get imports.
I only went to the Pevely Flea Market once, and got Super Punch Out! and Mega Man X for $20 total. Too bad it closed.