Mannyrock has some good suggestions as far as tracking value. Have you taken it to a good shop for their evaluation? Frankly I'd get it rechambered or even consider having the bore sleeved to 30 cal and chambered to 30-30 if that is possible. I have been trying to find 32-40 ammo for a friend and it is extremely scarce and expensive.
liberal Justice Hugo Black said, and I quote: "There are 'absolutes' in our Bill of Rights, and they were put there on purpose by men who knew what words meant and meant their prohibitions to be 'absolutes.'" End quote. From a recent article by Wayne LaPierre NRA