It appears that everyone and their uncle are agreeing that this barn find, found in Swansea, England, is one of the best finds ever. While I'm more of a Boss '9 in Kentucky kind of guy, I'll agree that these low mileage rides are indeed quite cool.
In order of built-for-homologation badness, there's 1) a white 350+ horsepower AWD Ford RS200 road-going Group B rally car with 1,042 miles, 2) two first-gen E30 M3s - which, normally, would put out 195 horsepower - in red with 37 and 57 miles on them, and 3) a blue 232 horsepower Mercedes 190 E 2.5-16 Evolution II.
Both red racers and the Benz were built so BMW and Mercedes could compete in Group A Touring, while the RS200 was made street-able so Ford could put people into the rally ring during the hairy-chested Group B years.