I've heard of lots heading straight to the docks to be loaded into a container (ANPR catching them near Liverpool).
I once sold an m sport 330 to a legit buyer, who once the cash was cleared into my account, asked me to deliver it to Southampton docks.
The car had left the country in less than 12 hrs after initial contact...
I had no problems, but the speed that the asset disappeared, with so little paperwork, was an eye opener!