- It is best to buy a used car that is 5-7 years old to get a good balance of lower price and fewer repairs needed compared to an older car. - When test driving a used car, check for strange sounds, problems with brakes and engine, and that lights and signals work properly. Also check the oil, tires, and for smoky exhaust which could indicate engine problems. - Be sure to get any used car inspected by a mechanic before purchasing to check for issues. Records of maintenance and repairs are also important to review.