Really interesting concept. It's basically a huge network of mailing lists around the world for different areas. You can join a mailing list specific to your area (towns/communities close together)
ANYWAYS its a site to recycle your old stuff, you can post WANTED threads for stuff for free, or post OFFER threads to give stuff away. There's no selling- everythings free. But when you join, certain communities have you offer something before you can want or take something.
Think twice about throwing that chair out- somebody might want it.