My school deals:
Midnight Club II for PS2 scratchless with case $ manual - $15
4 x 14" Chrome HubCap Spinners for my '87 Accord - $15
Sold Marvel Vs. Capcom 2 for Dreamcast for $60
My only bad deal:
007: Agent Under Fire for PS2 used without manual - $10, I know, I was probably drunk or something... I can't remember
School is like a physical eBay, one of the prime places to look for cheap stuff.