Yes, we don't have one because we're a reef related board. For general stuff,
www.buysell.com or
www.ebay.ca work really well. If you look at the board now, more than half the posts are for sale ads. If we include anything lying around the house, the whole board could become a new ebay. People could sign up solely to sell all their junk, without even knowing what a reef tank was. This has been discussed ad nauseum, we don't allow things not aquarium related.
The buy and sell is a free paper, and has a huge reader base. It's where I sell my stuff.