This is a tough question to answer on a car like the MP3. Kelley's Blue Book says $13,500 for my car (20,000miles in basically mint condition), but I don't think it factors in a lot of what we have. "Premium Sound" usually means some bad Infinity 6 speaker setup, while we have a MP3 player, great speakers and a sub. "Premium Wheels" probably does not take into account that the wheels on the MP3 go for $250 apiece new. Who knows if it takes into account the excellent suspension and being limited edition. If I were to sell my MP3 today, I would ask for $15,500.
Chris