No idea if they sell or not at those prices. When I was looking for a backup bike a few weeks back, I offered $200-250 on probably 5 different bikes, all of late 2000's vintage that had Sora level components or lower. No one would budge. One even claimed a LBS "valued" their bike at $400.

Not saying there aren't deals to be had, but I get that if someone wants a bike, they don't want to be stalking CL for a month or two to find something that isn't overpriced and in their size.