In the 3rd scenario, Mannie didn't have the full 100,000
Okay, we know for a fact that the tramp bought himself some nice clothes, food aswell as a bike. It's pretty likely therefore, that he bought some other things with the money aswell.
THEREFORE, there is no way that Mannie gave the dealer the full 100,000, unless he made up the difference himself, but this is unlikely since he didn't have any of his own money.