Being a gun enthusiast, I'd sell every other firearm I owned before I'd sell ones left to me by my Grandad. Especially such grand examples such as those. And what better way to honor him than to use them? (gently) To me, it would be more sacrilegious to sell them.
I just had my late fathers M-70 to the range to give my nephew (his grandson) an opportunity to shoot it. It brought back great memories of days gone by.
Just My Opinion, Your Mileage May Vary