If I was not in need of buying a 4x4 for the winter I would have taken it off you. Why not keep it till spring next year! be a better time to sell! I think you will be lucky to be offered 6k in part-ex this time of year (depending what you are are buying) as they are not easy to move on, as you are finding.

I assume you have tried it on the AutoTrader and PistonHeads?