The thing is no matter where you are driving a $500k+ sports car is not a crime, they can't stop you for that, he could have just took his time, playing it safe and got to whatever dock or truck he was heading for. Chances are he knew how long it would take for the salesman to get to a phone (I assume he didn't have a cell phone) and the time to get the story straight and a response sent out.
If you have a team that's organized illegal things are not that difficult to pull off....fortunately it's rare criminals are smart enough to keep it going.