Outfitter Shed Hunts

This has always been a question of mine. For these outfitters that raise antlered animals, what do they do with the sheds? Do they sell them? Let them chalk up and vanish? Do they sell hunts for them like they would an actual animal? If they do sell the sheds/hunts, how much do they run for? Also if anyone is selling decent fallow/axis sheds, please dm. Thank you!