So maybe 80 is not unreasonable?I had about 40 miles on mine. All new cars I've bought had up to 100 miles on them. Seems reasonable for transportation needs and test drives at the dealership.
Why is it irrelevant if it's a lease?If you are leasing the car, it is irrelevant.
If you are buying the car, the manufacturer allows up to 500 miles before its needs to be a customer unit.
I cant speak for other stores, but we dont trash cars here, but do offer extended test drives etc on occasion.