A whole lot of dreck on offer, but after reading several descriptions of the cars, it seems that Klein would purchase cars, including many rare ones, drive them for a short period of time, and then park them in a shed and from to time sell parts off them.
He did this even with unique limited production cars, like the alloy gullwing, and even back a fork lift into that one.
For all but some of the very rare and relatively untouched models, one would need to a brave soul to buy any of the cars at auction.