The average backup QB in the NFL makes just under $2M, so I would hope we wouldn't have a problem paying Flynn somewhere in the $1.5M-$2M range.
Look, the man knows the system, he knows the offense, and except for one game, he gets the job done here when called upon. That's all we can possibly want from our backup. We don't need a developmental QB, we have Aaron Rodgers for probably 10 more years. All we need from our backup QB is a guy who can come in and run the offense and give us a chance to win if Rodgers misses a week, or multiple weeks.
Flynn is that guy. We know that now, and the sample size continues to get larger every week. Sign him and go into next year without the backup QB headaches that we have had to endure. You hope we don't need him at all next year, but we learned this year how important it can be if we do need him. It's an insurance policy that we don't need to worry about our entire season being lost if Rodgers goes down. $1.5M-$2M is a small price to pay for that peace of mind.