That is a good suggestion.
I've made a list of my collection and what I paid for each & it's value.
But my wife has already told me she doesn't want anything to do with my guns, regardless of it's value.
If she was to find out how much I have invested in guns, she would probably kill me anyway. lol
There will come a day when I'm unable to get out and shoot anymore. I intend to sell my entire collection by then.
I've been reducing my collection a little at a time. I have enough to keep me happy. your mileage may vary.