When i was buying in some cars for resale, most of those offered as a private sale, were actually dealers selling damaged repaired vehicles. Often they were not named as the keeper but the registration documents also reveal the car has been a total loss. I phoned one previous owner of a car i was looking at and she told me all airbags had gone off and the whole side of the car was caved in, including the roof. Hard to spot the repair. You need to check the air bag warning light comes on when ignition on. Often these repaired cars have air bags removed and the warning lamp disconnected. Be wary of any low mileage, car under 3 years old offered at a cheap price.