On Twitter, Buster Olney posted this:

Heard this: Matsui's attraction as a marketable asset is no factor for the Yankees. It is about getting the right player at the right price.

This seems pretty straightforward. The right player for the right price is always the goal. But, how do you come to the right price? By considering the player's overall value and part of that value is in the money he can make for you. If Matsui is thought to be worth $15 million in additional revenue, then it would make sense for that to factor into the equation. But, if Matsui's not the right player, then no, it doesn't matter.

Via Joseph Pawlikowski.