I found a bunch of interesting stuff at my 2 EBs:
Power Monger (Genesis, complete) - $4.99
4x Dreamcast Memory Card (1st party) - $4.99
Chu Chu Rocket & DC Memory Card - $7.99
Playstaton Mult-Tap - $3.87
MPXChanger (lets you download saves from internet for PS, N64 & GB) - $7.87