I am afraid shows like wheeler dealers and others have increased the, whats your lowest price, in other words, the low ballers. I sold mine from ebay, all I got on the add from here was people wanting a deal (on the most part) and sold for a fair bit more than the price I asked on here.
My advise would be, get a comprehensive add up on ebay, answer any sensible questions and just ignore the rest along with the stupid offers.