Fair price in my opinion. I don't see the big deal with the 19" wheels. I prefer the look of the 21" wheels, but prefer the ride of the 19" wheels. I currently have a deposit on a similar CPO P85 with autopilot through Tesla (I'm just waiting for them to value my trade). The Tesla CPO I have a deposit on has a few more options (Tan leather/alcantara seats, air suspension, rear facing seats {that I don't want}, premium interior lighting, subzero package, glossy wood interior, alcantara headliner) but I am paying $5600 more. If I could be more patient and just sell my current vehicle outright(2015 Audi Q5 TDI) , which I don't think would be difficult, then a private party sale would be an option for me. But after waiting patiently for years to buy a Tesla, after making the decision to go ahead and get one patience is not my thing right now. I had originally said I would get one in 2017, but I test drove one over the new year and just decided I would only be two years older in 2017. =)
John