When buying a used car, it is important to take mileage, age and condition as equally important factors, as they will all contribute to what the vehicle is worth and the potential lifespan of the vehicle. As an example, a low-mileage car in poor condition is not necessarily a better buy than a high-mileage car that has been well maintained, although the former may be more expensive to buy. We would recommend setting a budget and looking at several examples at the price and consider each car on its overall merits rather than giving priority to one factor.