I'd imagine there's some sad story behind this. Looks like most of these haven't been touched in at least 10-15 years. I dont understand why people hoard them only to let them rot.
My bet would be an estate liquidation of some sort. Looks like a dirt floor in the building; that's certain death.
On second thought, it looks like most of these were dead before they were even stored. Cant imagine any drove in under their own power.
Someone ought to offer the guy $1000 bucks in cash for all of it.
It would take a week to clear them all out of there. Sad, really.