I know, I know... I only come on here when I have something to hawk. (Is that how you spell it? I've only heard it said out loud...)
So I just listed the 6 artist proofs of my Adventure Time trading cards (released 23rd July by Cryptozoic Entertainment) on eBay and there's a week for you to get your bids in.
Good hunting! (Oh wait, that's Battlestar Galactica, not Adventure Time.)