Probably because there is more demand, thus higher prices, for vehicles under 50k miles. In the age of internet shopping you can easily filter by mileage, and I’m sure 50k is a common threshold for a lot of people.I am trading in my 2017 Wrangler Sport S and the dealer asked if I would be able to keep it under 50K when I ordered my new Gladiator. Is there a significant reason they would want me to do that?