The Cost Of Buying A Used Car This project has been put together to show the cost of buying and using a used car for one year. To show the different costs for cars I have made a chart on a later page. First, though, It probably would be good to tell a little about used cars. Used cars are, for some, a good investment. The used car is good for cheap transportation, and fun. Used cars also have many different uses besides just driving around. Some people buy used cars so they can restore them, while other people buy used cars for their children to drive. While still others get used cars fo