If I got a rifle from my grandfather you can bet I would get it fixed, it would be worth more than the monetary value to me.
I have a Marlin 60 that I got from my grandfather. It won't cycle and has metal shavings in the bolt area. I'm not much of a gun tech outside of my handguns and AR.
I know they are fairly inexpensive so maybe not even worth taking to a gunsmith?
If I got a rifle from my grandfather you can bet I would get it fixed, it would be worth more than the monetary value to me.
A very common problem on the 60 is the part that has the feed-ramps built into it. It performs multiple functions but in general it accepts the round from the tube and helps feed it. This part is made of die-cast zinc IIRC and it wears very quickly. I've done a couple of them before but most people decided it's not worth it. In this case, it is likely worth it to you. The last time I worked on one the part was ~$30. If that is the part causing you problems it's not terribly hard to replace...