Lazing Dirk
Arcane
So if we ever come across a similar situation, I think the best tactic is to offer the player his cut after sale, i.e., we would buy the HH and sell it for 80 ex and then give him his cut of 40 ex after the sale. While we wouldn't keep the HH the profit off of that would still be enormous.
If someone offered me that I'd probably just assume they were a scammer. They'd surely want some kind of deposit at least.