“Who’d want it?”
It’s called salvage.
First on the scene of the sinking/crash owns the rights to it.
Again once you’ve sunk a boatload of money in salvaging the thing you have to find a buyer. And it kind of has a history of drowning the people who sail in it. So your comment about salvage is irrelevant unless there is a buyer. Of course if it’s cut up and scrapped the salvager can get some money out of it, but probably not what it cost to recover it.