i use mine to package reloaded ammo but it's not for sale just easier for my storage needs!
I dig out the old boxes and use them for my reloads. Boxes wear out after a while and it's expensive to purchase new (plastic) ones. I noticed at least one range trying to sell the old boxes for reloaders. I think they gave up as it wasn't worth the time and trouble. There are some "rich folks" out there that can afford to buy new ammo and leave the brass behind. (And when you see nickel plated brass, you know that's some millionaires shooting on the range!)
I suspect that trying to repackage and sell old ammo may be illegal. I don't know of anyone doing that, so I also don't know if they've gotten in trouble. I've seen some really ugly boxes of ammo for sale at gun shows and wondered what closet they were cleaned out of. I wouldn't trust those gypsies no matter what they're selling. They all seem to be able to pretend they're firearms experts while telling people outrageous lies with a straight face.
I work GunShows some times I have a neighbor the specialises in older Mil Surp. Has a lot of "odd ammo". As I understand, some of the boxes are worth more than the ammo.I asked the as hole why he just didn't use baggies, and his reply was, that it would make people think that they were 'reloads'.
The bull shit just flows out of this guy constantly.