Before you are going to buy a used car you need to do some homework. It might save you serious money. You need to consider your driving habits and what the car will be used for, and your budget. You can research models, options, costs, repair records, safety tests, and mileage-online and through libraries and bookstores. When you are going to start shopping for a used car and whether you are buying used car from a dealer or from an individual you need to follow