<prompt> Human: I assume similar logic can be applied to the northern states where the harsh winters ensure that the roads are covered in salt water for 4 months straight. That being said, what is the best state to purchase a used car?  <response>: Coast isnt an issue. Ive bought several cars in southern California near the coast and they were fine. What you need to worry about is places where the salt the roads. That will eat up your car fast. 