They get Ernie Sims for essentially a half used bottle of cheese whiz. This is one of the more underrated LB's in the NFL.
He's a midget...he's probably no bigger then CC Brown, but he can cover. Regardless..the Eagles got a quality LB for practically nothing.
I didn't even know the Lions were open to dealing Ernie and its really not like he'd be a great fit on the Giants. But it does give them a quality LB for their weak side.