I just barely got beat out for a $125 Burley Piccolo on CL the other day. Not too exciting for you road guys, but the Piccolo is discontinued, expensive, and is apparently the only good trail-a-bike.
When I got my current commuter, I missed a lot of good bikes on CL - lots of cheap Volpes and stuff. I nabbed my OCR-T as quickly as possible. It also had no picture, so I think that really hurt the effectiveness of the listing.