I, for one, would hope that the Yankees are involved should Greinke hit the market. His previous issues with depression are a bit worrisome, considering the voracious nature of both the fans and media in New York, but his talent is simply undeniable. I wouldn't sell the farm for Greinke (Montero remains untouchable), and the Royals would be justified to hold out for a considerable haul ... but I'd keep an open mind. Nova, Warren, Laird, and Gardner, perhaps?
What sort of package would you offer?