Well, like today, when you get in a car accident, most times the insurance company will tell you that it will cost more to fix the car than what the car is worth.
Same is true for most guns.

There is a great satisfaction to restoring an old gun, car, plane whatever. I hope that you will decide to do work yourself and derive that satisfaction.
I found this nice link on how to build a duplicating attachment for a milling machine. Using a milling machine on wood is like heaven, it goes so quickly
when you are making cuts 0.05 inches deep as opposed to 0.01.

duplicating attachment for milling machine