You can't take them with you to the grave. I'm sure in whatever afterlife there is you could just imagine a game and voila.

That said don't leave it to your family to sort out when your 70+ and can't move a machine without calling your Son or grandkids. Cause your wife or kids are going to have one heck of a fire sale. I've seen it happen to many times.

That said. I keep a game awhile. I sold a few that were sentimental and other than BSD I've never had any regrets.
If I was able to pay a % of the value of my personal collection via admission or coin drop I think I'd hold on longer.