I think he'd be a great player signing. (*** ducks ***) IF he'd be willing to be a backup/mentor. With Daboll as the OC and the Bills running many Patriot concepts, what better veteran in the QB room could there possibly be? And if he had to play he'd be a heck of a lot better option than Matt Barkley. Plus there's practically no chance of a QB controversy because of his age.
But I'm sure he wants to start somewhere.