The Tesla Model X doesn't see quite as many U.S. deliveries as its sibling, the Model S. However, it still fares well on our chart. For a vehicle that is significantly more expensive than any other vehicle in the top 10 and almost every other car on our entire sales chart, an impressive number of copies have been delivered so far this year. Through the end of August, Tesla has sold an estimated 13,600 X SUVs in the U.S.