Where's a few good sites to place a camper for sale?

I put it on Craigslist and did get calls from some place in Kalifornia wanting to 'put me in touch with people interested in that model of camper'. After I asked them to remove me from their call list, they did.
So on this site why dont they remove the classified banner? Seems kind of goofy and makse the site look bad having an option that doesn't work.