With a bevy of incremental improvements for 2018, the Ford F-150 pickup looks to stand its ground as the best-selling vehicle in the U.S. with up to $4,250 cash back (depending on the trim level) or a financing deal that, while it may not be the best on this list at 7.9% interest, it can be extended to 84 months. (Leftover 2017 models get up to $6,250 cash or 3.9% financing for 84 months.)