It's a pretty crappy year for UFA skaters, but the goalie pool will be relatively deep. At the same time, there are a lot of teams with big needs in net, and so competition for the top guys will be stiff. I don't know what kind of goalie Calgary needs to be successful behind their defense, but Elliott has shown a few flashes of very solid play this season, and that might be enough for them to bring him back, even as a back-up, if they can't get one of the other guys on the market. Even as a back-up, he's probably worth more to them next year than a 3rd round pick in the 2018 draft. Important to remember that Chad Johnson is also a UFA, and it's hard to say whether or not any of their minor leaguers are ready for backup duty yet.
Notable
UFA Goalies this summer:
Ben Bishop
Scott Darling
Steve Mason
Ryan Miller
Jon Bernier
Elliott
Chad Johnson
Darcy Kuemper
Anders Nilsson
Mike Condon
There are so many teams that need goalies though: Senators, Bruins, Leafs, Red Wings, Sabres, Blackhawks (probably), Jets, Stars, Avalanche, Islanders, Flyers, Canes, Flames, Kings, Yotes, Canucks. That's not even considering the shakeups that the expansion draft will cause. It's going to be a big money year for goalies, so it might behoove the Flames to hold onto Ells since it will be easier to control his costs.