I reckon you have a very good chance of getting your money back....just don't go too mad with the options. I would say you need to have the Media Pack (or at least Satnav on it's own) and the Dynamic Pack as I think these will be the most in demand options. Satnav is a must, but check with your dealer as he will hopefully advise you well given you are obviouslt a very good customer. You will get very little extra for the low mileage, it will make the dealer keener to buy it but they won't pay you much more!

A freind of mone ran several X5 3.0 D Sports on the old shape trading them in every year and suffered very little depreciation. I reckon that the new X5 will be similar for the first year or so as I think the waiting list will grow once it hits the road. (I saw one over Easter in Switzerland....it looks fantastic!)