The car was sold, and the second-hand car dealer said that the car would be returned without inspection.

The car was sold, and the second-hand car dealer said that the car had not been inspected properly, so it should be returned: call the police. Second-hand car dealers are experts in vehicle identification, car buyers are amateurs in vehicle identification, and experts are cheated by others. This is not a big joke. Besides, used cars are not bound by the state's three guarantees obligation. Once the transaction is completed, the subsequent matters shall be borne by all parties themselves (unless otherwise agreed in the car purchase agreement). Can't return it. It is their business that the car has not been properly inspected. Now the car has been sold to a secondhand dealer. The contract has been signed. That can't be returned.