I've had really good luck with CL here in the D.C. area.
I sold a bike - my DH bought a bike. We've gotten exercise equipment (a nice rowing machine that is beside me unused at this moment, as I type this! ). I've also sold camera and stereo equipment, pots and pans, bike parts, and given away stuff in the "Free" section when I couldn't bring myself to ask for money for something. It's a great place to sell things that you don't want to throw out or give away because they're too good, but for which you really have no space in your life. And who has the time/space/energy to host a yard sale??