RM really bolloxed this up. They tried to play it off as a joke. This vehicle is too much of Frankenstein monster with a tainted Nazi history for most people. Porsche AG and the Factory museum claim zero interest in it. We'll never know the truth I suppose. It wasn't badged a Porsche for the first ten years of it's life. Read Hannah Elliott's Bloomberg article for details.
https://www.bloomberg.com/news/articles/2019-08-18/type-64-nazi-car-by-porsche-fails-to-sell-amid-auction-blunder