Such an account most probably has everything on for being recovered, hence I expect that whoever falls for this "great business" will end up soon enough with the money gone and no account.
And no escrow can fix that.
Scammers like something that will attract someone to become their victim. What I am thinking more about this is that the account seller of a merit source account is not selling anything but a lie. He may want to troll or looking for a way to scam. But just like you said, if this is legit, the buyer will later lose. With the cost of the account, it is a scam.