The price of used cars is a large number of vehicles of the same brand and model enter the used car market, and the price is balanced through competition, which is the most basic price principle. In theory, the second-hand car price chain starts from the new car price comparison, such as a second-hand Jetta, first of all to compare with the new car price, and then according to the years of discount. The discount is the highest in the first year, and the discount will gradually decrease each year.