Marquise Brown
Marquise Brown is only 26 years old and has that speed element the Buffalo Bills need. Things probably haven't worked out the way Brown had hoped when he signed a big-money deal with the Arizona Cardinals. Spotrac.com has his market value listed at over $14 million annually, but I doubt he gets that kind of money. Even still, I think the money could be higher for him than what the Bills can or would be willing to pay, but if the money is right, I'd be all for it.
Let me make sure everyone understands this though, regardless if the Bills sign a free agent receiver or not, I hope they still target one early in the coming NFL Draft, preferably first round, and then double down at the position in a later round. That said, Brown could fill in nicely as the Bills number two as an insurance policy if that rookie receiver isn't ready. If he is, Brown is an even better option as the number three guy.