In some countries in Europe (Portugal and Holland, to mention two - Italy as well I believe), automobiles are taxed heavily according to engine size and type. The price of that 928 when it was new was roughly $100,000 and he would have had to pay probably around $10-$15 per c.c. of engine displacement for a car like that, so that's $50,000 to $75,000 in fuel tax plus roughly 15% federal tax on top of that so the 928 would cost him around $200,000. Commerical vehicles however are exempt from that tax, so you will see a lot of cars with the rear seats removed and a cage behind the front seats or even modifications like that 928. Even cheap cars like VW Golfs and Fiat Unos are modified to make them cheaper. Vehicles weighing over 2,500 Kg (for "agricultural and commerical use") were also exempt a few years back so there was a boom in SUV sales because you could buy a Range Rover for less than a Honda Accord. The government finally caught on and started taxing trucks too. Whenever governments over-tax things there will be people looking for ways to get around it, even if it means butchering a car you want badly to be able to get it.
Actually I kind of like them all, I wonder if the Porsche Design team ever thought of making a shotgun & a gun rack for that 928? That would be sweet.
The guy who owns/owned the red 928 Porschecamino is the owner of one of the largest 928 parts houses in the US. It is a rolling advertisement for his business and also was practical for hauling parts. He was trying to sell it about a month ago. I'm not sure if it sold or not.