Which, I imagine, is why he has expressed his desire to stay in Buffalo. Avoid the risk that comes with FA and get a deal done now—probably a better deal than he'd get on the market. The Bills gets continuity, probably at some discount.
The question is if the Bills think he's the best solution for the position and price. I think they like his versatility and will try to keep him at a reasonable price, and Feliciano will probably take it.