This is a great point. None of us know what teams have offered or will offer for Abreu. I remember last year coming out of ST some felt Hahn missed the boat on trading Q and should have taken the best offer over the winter. I think most would agree that Hahn's patience payed off.
Personally I think if Hahn gets an offer that meets or exceeds his asking price Abreu is gone. If not then worst case scenario is we get to watch Abreu tear it up for another 1.5 years, which I'm absolutely fine with. Also, I feel Abreu's bat will age well over the next 3-4 years so I wouldn't complain if the Sox decided to extend him.