Rust out! I dug out this picture of a rollback my buddy had in his junkyard. I think it's an Autocar but wouldn't bet on it. Not only a stainless steel deck, a stainless steel cab. Don't know the year of the truck or the history, only that it wasn't registered, wasn't being used. I didn't ask and he didn't volunteer.
It might seem like an odd situation, but along the driveway to his house, through the junkyard, he installed a Thunderbird planter for flowers. You can't tell because of the weeds but the hood is over six feet off the ground. Bolted the doors shut and filled it with dirt so it didn't take long to rust away.
So you see, a stainless rollback sitting unused didn't strike me as outrageous... in context.