Craigslist is great! I sold a sofa, a desk, chair, shoe holder, curtains, framed art, dog bed and a big piece of cat furniture. All in the past year and none of the stuff took more than a day to sell. Just price things well, make sure its clean and its gone in no time.
Now the bad part is when people take your free stuff and post it back up for a price. Especially, if it was supposed to go to someone who gave you a sob story on how they needed the fish tank for her son as a gift. (Then posted it up for $80) So now I tend to just charge for everything.