This is the issue with the Flames they truly have NO untouchable core players.
I believe Calgary will be open to trading any single player on the roster, but the ask on some guys will be really high. I have it like this:
Tier A - Guys that will require a very large overpayment to move.
General rule of thumb: They're young, on a good contract, and are bright spots or have been bright spots very recently:
Noah Hanifin, Juuso Valimaki, Dillon Dube, Andrew Mangiapane, Elias Lindholm, Matthew Tkachuk
Tier B - Guys that will require a better-than-average return to move.
General rule of thumb: Guys who are playing well, or have been key members of the organization. For example, guys you wouldn't move for just a first round pick in the 20 range and call it a day.
Chris Tanev, Johnny Gaudreau, Mikeal Backlund, Rasmus Andersson
Tier C - Guys that if a deal came up that had exact value, you pull the trigger. Example being, you'd be happy to move for a first round pick in the 20's and call it a day (not saying they're worth more or less than that, example, Monahan if the offer was a 1st + B prospect kind of thing).
Sean Monahan, Mark Giordano, Sam Bennett, Doc Ryan,
Tier D - Guys that have little to no value anyway.
Pretty much everyone else.