Check out Listia if you like ebay

Listia is just like ebay expect you do not use money. You use credits. You earn credits by signing up, checking in once in awhile, inviting friends (you earn 50 credits for every friend you invite) and linking to your facebook account also and more. Those credits you earn you put them towards auctions for free stuff....You also get 100 free credits for signing up. Check them out today..