A used car can look spotless and still hide past flood damage, an accident or a history of mechanical trouble. A low price is no bargain if the car needs major repairs soon after you buy it.

Start by getting a vehicle history report using the car's identification number. These reports can show reported accidents, title problems, past ownership and sometimes service records. They aren't perfect, since not every incident gets reported, but they can raise red flags worth asking about. You can also check for open safety recalls through the manufacturer or an official recall database.

Before you commit, pay an independent mechanic you trust to inspect the car. A good inspection looks at the engine, transmission, brakes, suspension, tires and signs of rust or frame damage. If a seller refuses to allow an inspection, treat that as a warning sign. Any problems the mechanic finds can either be a reason to walk away or a fair point for negotiating the price.