Could be more. Check out Collectors Firearms list of some the have.
Personally---just me---the worth of a weapon is in the history and the sentiment.
Now, and this may seem a contradiction, I would let a GOOD Smith, one with feelings and a good head, take a look at it, put it in GOOD working order and used so as it has been used for years, for shooting and defense.
You know the history and it is your history---continue the history---those before you would stand and cheer.
Blessings