This isn't exactly what you're asking, but it's close:
I was one of the kids that actually kept all of my NES & SNES game boxes (and kept them in good condition too). I proudly displayed them on a shelf in my bedroom.
Some quite valuable boxes today (Dracula X, All the Mega Man X games, all the Final Fantasy games, Secret of Mana and a lot more).
When I went off to college I didn't have room to take them with me so I boxed all of them up, along with a complete set of Nintendo Power magazines up to that point (around 1997).
I asked my parents to store them while I was away. My dad without really thinking about it decided to store them in the garage (which was very damp).
When I asked about them later he told me, "oh sorry, those got covered in mold, so I threw them away).
He didn't mean an harm, but damn does it still hurt knowing how much that stuff is worth now. Luckily I at least had the carts kept separately, so they survived.