we have all seen the big drop in resale value recently. Lots of people complaining about it.
I have also seen a few people buy a car and then try to sell it at a higher price than they paid for it 6-12 months ago. Good luck is all I can say.
If you find the right buyer then they'll pay the price. But for the majority who see R's on the forecourt brand new at 15k, 10k is probably about right.
Sell privately if you don't think its enough - but you might have to wait a while for a sale, and every day older it gets it could be depreciating more.
Good luck in whatever you do though.