I mean you just search on google... Zerodium, Crowdfense, Exodus Intelligence, etc.
Sure, I'd say the "sell it elsewhere" stuff is always a bit overly optimistic but due to the nature of this specific exploit I am pretty sure you could find a buyer offering good compensation.
Does Zerodium even exist anymore? The impression I have is that people seriously selling clientsides weren't going through any firm a typical message board thread would be talking about.