No argument with any of that; it's a terrible situation for a trade for the Bills.
But if the Giants were stupid enough to let him go for a mid-round pick, I'd be really tempted to roll the dice.
We're looking to win a Super Bowl and if we have to lose a 3rd/4th rnd pick on a 1year rental that could potentially put us over the top, I'm taking a serious look at it.
If he does have a great year and we lose him in FA, maybe a compensatory pick replaces the pick we dealt for him.