I am researching a book and one area of interest is concept cars/prototypes that once graced the stage at Int. auto shows but then later, by hook or by crook, got sold to the public and are now on the road. For instance in the Lotus world there is the ETNA, which Dutchman spent huge amounts making into a running driving car but then failed to reach reserve at an auction. Any nominees such as what happened to the Pininfarina Jag, etc.?