I have P11XXX, a P85, every option they offered at the time except 21" wheels and air suspension. 74,000 miles. How do I go about figuring out what price I could potentially sell my car for? I suppose I should spell it all out. MC Red Pano Dual chargers Jump seats Carbon Fiber interior with performance seats Tech package Studio sound 19" seats Coil suspension might be forgetting something, but that's what mattered to me when I bought it.