Here, if someone wants to drive away with a car in a private sale they need to bring plates to put on the car. Rarely do the plates get transferred. Even in cases where the plates are transferred the new owner must have proof of insurance before the car can be transfered into their name. There is no way on earth that I would let someone drive away in a vehicle that was still registered to me and under my insurance. I wouldn't even do this if they were a relative or my most trusted friend, not that I do business with friends and relatives, but you get the point.