Now that my deal is done I will share my story. After heartache from missing out on some great deals last winter and them not materializing this winter, I decided to take another look at third party sellers. As I was looking at the VINs something struck me, certainly one or more of these out there were PREVIOUSLY CPO!
I started looking up VINs in Hank's historical database, bingo! Two near where my brother lives in the Dallas area. Blue P85 loaded with VIN > 7000 with >2.5 years left on the CPO. How did I know that it was sold as a CPO and not just UNlisted? Cross-check the dates against the free Carfax or Autocheck (provided by the seller). If mileage and dates of registration in the Carfax history match the date it was removed from CPO listing chances are it was sold as CPO and that date and mileage reflect the warranty reset. I called the nearest service center and asked about the warranty expiration and was able to confirm expiration at 66,000 instead of 50,000 miles!
I eschewed 1-owner listings - guaranteed a sooner rather than later warranty expiration (unless the owner extended the warranty with Tesla). I shared my use case of his history, but figured it would be counter-productive sharing it before I completed my purchase. I hope someone else can benefit from this. Hank's tool really is quite useful.
Now I will focus on getting it to Nashville from Dallas. Can anyone recommend a shipper?