The guy they got sucks, except for about 3 months of his entire career.
But the guy they gave up (lugo) really sucks.
we traded crap, and understandably so, got some crap.
Maybe Duncan can help lead the Pawsox to an International League championship.
Edit:
maybe I was a bit unfair. Duncan is cheap and under team control (arb, etc...) through 2012. if he starts mashing the ball (I doubt it) you have gotten some sort of value for Lugo.
The fact that he has options remaining is a plus, because he can go right down to the pawsox