Sorry that i don't have the time to read the full thread but is the sale of the account confirmed? The real master-P was a great guy so it would be pretty bad when he would have sold his account because it would make him himself a scammer. He would know that the buyer can impersonat him now and he would be liable to damages in my eyes. It would be a pretty dumb move if he acted that way.
He would have allowed a stranger and possible scammer to impersonate him. He would not be able to speak himself out of this then.