Harbone, if it were me you couldn't buy one of those guns from me. Your G-Pa kept them till this late in his life and I would do the same thing. No amount of money is worth some things to me. The older I get the more things mean to me.
If you sold the guns yes, it's some $, but what will that little bit of money do? Not much and I don't think your a guy that needs a few $ for Christmas money.
IMO put them in a safe then one day pull them out and just hold onto them and think about the good times your G-Pa had hunting with them.