Man pays $2500 for Sonic X-treme demo

The Digg link says it all: "A man pays $2500 for the only playable version of the Sonic X-treme known to exist. This is hard core." I don't care how little or much money you have, but $2500 is a lot of scratch to throw around for an unreleased game. Granted, I'm not the collecting type, so it's hard for my little brain to fathom such a purchase.

Would you pay $2500 for an unreleased game? If so, which one?

[via Digg]