100% free. That both to post auctions AND to bid. 
There are no hidden fees (like ebay's little 1% 
winning fee) no extra fees for having a picture, 
no fees for ANYTHING. It is simple. I love anime, 
and my g/f loves art (kei.boboki.com), so, I am 
at least decent with web programming, so I put 
this auction site up.
You CAN sell literally anything you want, but its 
primarily anime and art. Yes, fanart is ok to 
sell. Cells are ok to sell. Half-eaten candy 
bars..... are ok to sell ;P
http://auctions.boboki.com