The car dealers in Yuma, AZ, Reno and other on the state borders will have huge sales.
Apparently you will still be able to buy/sell used cars in CA. So why not buy car in Yuma, drove it to San Diego and sell as slightly used there?
Some leftist DA will probably use “interstate commerce” clause to prosecute. =o/
Just a guess. California citizens wouldn’t be allowed to register new cars bought out of state. A new arrival to the state would be allowed to register their ICE vehicle.