ORIGINAL: Waterproof
I keep every single gun box from any gun I have ever bought and also keep my scope boxes. I also keep the receipts for the guns in my serial number book that I keep as a record of all my guns. That is kept in a safe locationand if my house ever burns down, get totally wiped of by a theif or some other problem. I have all that information available.
He really keeps all this stuff because...He's just a little on the weird side!