Yes, I have a decent idea, but if you want to sell something that is easy to steal, don't cry when it happens.  As far as I am concerned, their insurance should take a good look at whether or not they did everything they could to protect their merchandise, if not, then deny the claim.  As for car lots, it would be kind of hard to steal many before the police would probably drive by.  Newer cars are pretty hard to steal with the electronic keys and such.