If Eli becomes available (big 'if'), and you think the Bills will sign him, then which of the following do wish to keep, because you'll only get one: Spikes, Hughes, Dareus?
Further, after his draft-day hissy fit, refusing to play for the team that drafted him (San Diego), what makes us think he won't hand pick his FA destination (like his brother did)? And if that's the case, what makes us think he'll pick Buffalo? You think he'll see us as a defensive-led contender, the likes of which he already helped him win two Super Bowls?