I have always seen the market value of guns to be an insult when pricing heirlooms. They just cannot give me enough to cause me to want to part with family guns.
This little gun isn't going anywhere!
I also have my Grandfathers, and my Fathers wedding rings. Oddly, we all had the same size hands. (I lost my wedding band some time ago, so I wear my Dads. Now that I have rediscovered Grandpas (with the gun) I may wear it on special occasions.) Someday, the rings, the little gun, and a few other treasures will be passed down to my daughter or grandchild.