I just went thru all the major car-selling services (CarMax, CarVana, Driveway.com, GiveUsTheVin, Vroom, etc) while selling my prior Tesla.
Offers varied from Teslas low-end trade offer of $59k up to Vroom which offered $67.5k. There were a couple close offers at $65k and $66k.
I sold to Vroom, and the process was really pretty good. Sent them required docs and pics. Notarized deal online. Flatbed came to get car 4 days later. Cash by direct deposit 2 days after that. Done.
Having sold cars private-party, this was vastly less stress and work - with the trade off that one might have gotten another thousand or two on the private party market.