Here's what I think Cally is worth, given his style of play, his age, his role, his level of scoring and, yes, his intangibles:
5 yrs x $5.0MM
4 yrs x $5.5MM
3 yrs x $6.0MM
(To me, anything longer doesn't make sense - and I'm sure no player hitting UFA, outside of the very fringe players or the very old ones, would consider anything shorter.)
But you know what? He's worth more dollars and more term to some teams. For example, if I'm the Oilers, I'd overpay to get his leadership there - and know he's locked in and not going to flee somewhere warmer in a year or two. Probably the same for Buffalo, especially given the hometown boy angle.
Furthermore - and this has been my stance since before we knew what his ridiculous contract demands were going to be - even if you were able to get him to sign one of the deals above, he'd still be worth more to the Rangers as a trade chip.
I won't make the mistake of calling him a 3rd line RW, because people get hung up on that. But it's clear that he's the 3rd most important RW on the team behind Nash and MZA. It's also clear that we have more options to replace a RW (some of whom may prove to be very good players in their own right) than nearly any other position on the roster.
Not only is it terrible asset management to let an asset walk for free, it is terrible asset management to have a glut of both talent and cap allocation in one position, especially one of the least important and easiest to fill positions on the roster. Cally needs to be moved both to bring back assets that hopefully can help address other needs and/or backfill the pipeline AND he needs to be moved to help rationalize the cap allocation on this roster. IMO there is almost no scenario where it does not make sense to move him.
(I think there is also incentive to move Girardi for similar reasons - plus the added fact that he seems less suited for AV's style of play than most on the roster. However, I'm less adamant about that one because 1) his demands seem more reasonable, 2) he's a legit first pair RD, even if his skills aren't a perfect for AV and 3) first pair RD is a lot harder position to fill than middle six RW.)