Just a thought
Sorry to hear that-I do a lot of car searches on the web and I have never hit that site-My guess is that its off the beaten search path.
I did take a look and did not see anything that sets them apart from RJ or Ebay-
You might try craigslist as well-I get some traffic from that.
There is one thing you can do though. You spent $500, at least bug them to death and try to use up $500 of their time-Call them every week and ask what they are doing to sell your car-keep them on the phone awhile. maybe they will get so tired of talking to you they'll give you some kind of refund. I doubt they are used to real work.
Later