This is nearly true, but at what cost 10K for a 58 plate!!!!! My roadster is one of the cheapest in the UK with some good modifications but it still has not sold, so am reluctant to believe that even keenly priced cars are selling. You really do have to knock it down to stupid money, then what are you achieving. Unless you can knock your next cars value down 20% or more, but thats a bit of a risk.
53 Plate?
http://www.pistonheads.com/sales/1163883.htm