Just find some interesting articles online about how to evaluate a service loaner car.
Other than the market price, there will be mileage adjustment.
Edmunds says at least 20 cents per mile.
And another article says people also need to consider how long the car has been used. The formula is # of months on the lot * 0.015 * MSRP
So for a loner car (or a demo), the price would be:
Selling price for a brand new car - mileage adjustment - age adjustment (maybe?).
What do you guys think?