It happens.
Frankly, no matter what his expected price tag, the Sox should be doing their due diligence with Cole anyway. They should be meeting with him, attempting to woo him, all that jazz.
By the time he signs, though, it's pretty likely that the Sox offseason is mostly concluded. But if they miss out on Wheeler, they need to go hard after Cole. Make the Yankees put their money where their mouth is and bid that shit up.