Ok, so the S is ordered.. as I prepare for arrival, I am thinking of how to sell me old car. Ideally I would sell my old car and have the S delivered with 24hours of each other. I could take it to local dealerships that do offer to buy used, even if you are not purchasing from them (I imagine that will yield the lowest value). I could try to do ebay, carsoup, autotrader, cars, etc.com to essential go with an online classified ad, and hope that timing works out with a prospective buyer. My question: Is there other companies (online?) that will do an appraisal of my old car and then buy it on a pre-determined date for a fair amount of $. How have others here done it?