Funny that this thread should come up. Just last weekend I was looking at my stack of shotgun and rifle boxes and thinking "Why am I keeping these?"
None of them are from collectibles - a couple of Browning A-Bolts, one or two Browning A-5s, a Remington 1100, a Ruger 10/22....etc.
They are stacked on top of a shelf in the basement. Not really bothering anything so I guess I'll keep them.
I keep all my handgun boxes for sure.