In chat, I usually try to get a conversation going about "how do you see" the players and prospects involved once initial proposals are out there. Do they see them as MVP caliber players, solid everyday players, platoon players, etc. If there are big discrepancies in perceived value, then there's not much you can do. If you can come to a reasonable agreement about what kind of impact players should have, it becomes easier to negotiate. A lot of owners naturally tend to over value their own players and prospects, so the point is often moot. But sometimes you can get an owner to do a reality check if you start a reasonable dialogue without denigrating his players. That tactic can come across as trying to diminish value.