>The seller sets the price. Not the buyer. You should ask why the seller is willing to let the vehicle go for a lower than expected price for a given number of miles.

The seller sets the asking price; the buyer sets the bid price; and mutual agreement between the buyer and the seller sets the selling price. When sellers set an asking price, they tend to refer to information about previous selling prices, creating a dynamic where buyers influence asking prices.

>Do those often persist through private party sales?

Yes: "Your New Vehicle Limited Warranty will follow your vehicle and be transferred to the new owner when a vehicle ownership transfer is performed through Tesla." (https://www.tesla.com/support/vehicle-warranty) You opened your comment with "Why guess?", so I wonder why you posed this as a question (in such a way as to hint that the answer is "no") when the correct answer was a Google search away.