I think it would do 600k on PPV. I don't know how the money breakdowns work, so I can't really say how much they are really worth.
But if Crawford is a non-seller on PPV and Manny sells 300k (6x more) for his worst selling fight, how've does Crawford get $7m? Crawford is not popular enough for that kind of demand.
Crawford seems like a $3.5 million fighter against Pac.
Honestly, Pac vs Crawford should be $15m-$3m fight plus PPV % for both. Go sell the fight, get buys, and both walk with what you wanted.