No idea. Only team I can think of here is Pittsburgh, who fits almost everything I'd look for if I was Stafford. But I don't profess to know what they're willing to pay. Only that they have gone through shit QBs and found out the hard way that you can piss away tons of money with those guys and not have a snowball's chance in hell of contending.
Way the Rams are playing this, just as I read it from the outside here, seems pretty damn smart to me. Stan probably said "get fucked I'm not paying more" or Stafford's team wanted more than Stan was willing to do. So now Stafford can find out his market value, and teams have been notified the price will be high. I think it's a good play for the situation.