One problem that may or may not arise in the future is the discovery of another "Bo Whoop". What happens then?
Here's my claim to fame in the world of Ansley Fox shotguns. The only D grade PAC gun known (sn348) and was almost surely in the Great Man's hands before it left the factory. There was a part of me that wanted to send it to the Julia auction, but I couldn't do it....
http://www.foxcollectors.com/philadelphia%20arms.htm