Look at the car during the day. Look for paint differences, crumples in the metal or rough finish. Look around edges of the trunk area, inside doors and under the hood for paint overspray. If the car has been repainted, it DOES NOT MEAN it has been in an accident. Open and close doors, trunk and hood several times to see if they close tightly and without hitting any other part of the car.
Frame Look under the car at the frame area to see if any part has been welded or bent.
Brakes Place your foot on the pedal and hold. If it sinks to the floor, the car is unsafe to drive. Safety Items Move head restraints and buckle safety belts several times to make sure these devices are working. They do save lives. Don't buy the car.