Phineas T Barnum was, of course, right....
Collectors must understand that "a very rare Luger" may not have been made that way at the DWM factory.
The Rock Island people actually posted a video about this very gun:
https://www.youtube.com/watch?v=OfeQabNcokE
which I think you could describe as their poster child for a "Fake".
If the Gunbroker buyer wanted a fake for $10,000 then everyone should be satisfied in the sale.
Sometimes the most simple Internet search can help save collectors thousands of dollars.
The GunBroker ad's text is a study in legal wording. The word "original" doesn't appear in it. "Prototype" is absolutely true - except that it wasn't made by a authentic original Luger factory. And "consistent with the description of" has nothing to do with originality...
Caveat emptor.
__________________
Igitur si vis pacem, para bellum -
- Therefore if you want peace, prepare for war.