http://www.marktplaats.nl (dutch) is an ebay company, they have lotsa fast growing sell/buy sites, theyre not really auction sites but most work alike, you can bid, dont have to register and free under a certain amount of $
heres the list
http://www.kijiji.de/
http://www.gumtree.com.au/
http://www.gumtree.com/