When buying a used car, do some research beforehand, and take a vehicle inspection checklist along with you. Here are some other best practices. Buying a used car can be a tricky process because no two cars are the same. Each vehicle has a unique history which can either work in your favor or become your biggest nightmare. To set yourself up for success—finding the right car at the right price with the best mileage and no major issues—be sure to do thorough research and follow these best practices.