My wife and I had that same discussion before. She asked "when I pass away, are you going to remarry?" I said I really doubt it. But she insisted that she wanted me to because she didn't want me to be alone. So she asked "so when you get remarried, will you live in this house?" I said I guess...
I keep the boxes, but don't believe that it adds to the value of any firearms I have. Now, say a 1950's Smith and Wesson revolver with original box, that is a different story.