I don't know if people here would buy your items, but if you go to oftopic.com, they have a section for people selling their trash.
http://forums.offtopic.com/forumdisplay.php?f=25 - link for yardsale
or you could also go to fatwallet.com and someone will most likely buy your stuff .. i sold my guitar, and old monitor (20" Flat Screen) for like $450.00
http://fatwallet.com/c/25/ - link to trade/sell