Its hit or miss around here. I use the St Louis area CL and I've had some pretty good luck.
A few crazies I remember was a Surly LHT for $2000 and a "vintage" Hardrock for $500. I go the same model/year Hardrock for $75 last week!
Right now there is a few great buys on older mtn bikes.
I passed up a great deal on an England made Raliegh, $40. I just couldn't get over there due to family.
Jerry