As someone who purchased a car out of state and took it back to NJ the only thing is you have to pay NJ tax on the sale. So no "extra" penalty that I'm aware of

As someone who purchased a car out of state and took it back to NJ the only thing is you have to pay NJ tax on the sale. So no "extra" penalty that I'm aware of unless they are doing that for electric vehicles which would be just downright horrible.