These are dealerships that do not have a physical location, meaning that cars will be delivered to your home. TrueCar has 207 used Cadillac XT6 Sport models for sale nationwide, including a Cadillac XT6 Sport AWD. Prices for a used Cadillac XT6 Sport currently range from $41,997 to $72,995, with vehicle mileage ranging from 1,897 to 185,000.