Why would anyone think the bills would move?
It would take a ton of money, a lot of time, and a seriously messed up owner to get the bills to move out of buffalo. Even if they suck, they've got a history there, and no team moves simply because of a losing record.
If you want to think about teams that *might* move, you're looking at the Miami Dolphins first and foremost. They've got a long history of losing, and they are one of the least profitable NFL franchises. My money's that they'd go long before the Bills move.
Oh ,and international NFL? Don't hold your breath. The NFL have been trying for years to take football international, and it never works out right. They've failed so many times that they're taking a nice long break, seeing as permanent teams never seem to work out.