I have purchased a new XC90 via Drive the Deal at an excellent discount. The car is due to arrive June / July. I currently have a 2005/55 BMW 740iL with many options, full history and 49k miles. It is a beautiful car, sold to me by BMW Park Lane in December 2008 and had a list price of nearly £70k when new. I'm struggling to get a consistent value / asking price for the car. Park Lane has offered me £11k for it. A Specialist Prestige buyer bid me £12k for it (both of whom I knew would have moved some more if I pushed them). What I can't reconcile is the book value / private ads are showing this car to be north of £15k. I'm now confused as I want the car to sell but I don't want a dealer to 'steal it'. I see with a warranty at a price of £12k I'm still leaving about £3k in it for a trader (which I know is a huge margin for a used car of this price). I'm aware it is an unusual car and will sell to the right buyer but I'm also aware that it could stick for a while before finding him. I am thinking of putting it through auction to get a better feel for it as I'm not that keen on a private sale with buyers coming to my house. Any advice would be appreciated.