http://solidsaints.com/
Specifically in games, there are a few auctions. A Steam Bundle with tons of games in it, even if you own them you could always give them out as gifts. Also Xbox and PS3 Bundles. Lets not forget all the awesome custom art auctions, food etc...
It's for the kids, people!
There is also an auction pool to alter Tubes posts. This one requires the combined effort of the forums to troll our Admin.
What are you waiting for? Give money to the kids and get something awesome in return!
Posts
For example:
GIGANTIC Steam Games Pack ($175)
Programming Lessons ($45)
GM for a Play by Post ($60)
Get your money out.