I did so recently and ended up winning an auction for several boxes of factory sealed NBA cards. As I sit here typing this I'm currently up to 10 Michael Jordan cards, 4 Shaqs and a couple of Olajuwons.
So what is the most ridiculous thing you have purchased off Ebay while laying in a drunken stupor on your coach at 3am in the morning? Bonus points if you were able to resell said item for a profit at a later date.