For the car collector with everything: a one-of-a-kind GM prototype from John Delorean. While the article claims it to be the progenitor of the Stingray Corvette, research seems to indicate the Corvette design was based on a much earlier prototype. The answer may never be known. It was always my understanding that the Banshee was an early ancestor of the 2nd gen Firebird. But what do I know?