The video game has that list explicitly and at hand, and it can be a bit silly. But don't you think most teams have such a list implicitly, in the sense of "I'd rather give up this guy than that guy, if trying to swing a deal"? To an outsider like me it doesn't seem so crazy, thinking in terms of such a list, as a way of making sense of how trades happen. "If I pick up the phone first, I might end up having to offer a better player than if I wait for the phone to ring" still seems like a way to think of things, and a list reflects that. It's fine if that list has great numbers of players ranked equivalently, instead of with decimal point gradations.