Hoffman - There's no market for him. He can score goals in the right situation, but that's it. There's a reason a 1-dimensional player like him was available for so long as a Free Agent for MTL to sign in the first place.
Byron - Maybe an opportunity arises to ditch him at the deadline with max retention. Nobody really wants or can afford a tiny 4th line "energy forward" hustle guy at $3.4M. It's iffy at half that price, for a small chunk of the season. But someone could bite for depth. In-season sort of deal though.
Armia - He'd be a great deadline sell-off candidate, if not for all those extra years on his contract. I don't see a market for him with those years remaining, and realistically...he's probably a guy that's worth keeping for the Habs. Can't just ice a lineup of entirely kids.
Drouin - Every time it looks like he might be starting to edge toward redemption to the point someone might take a flyer on him as some sort of cap-swap deal, he ends up injured. Between that and the general "stigma" surrounding him + his attitude, the Habs are stuck with him. Someone will take a very low dollar flyer on him as a UFA next summer as an island of misfit toys spare parts project, but that's about it.
Allen - Would definitely have value if the Habs were to shop him. He's a capable #1b and there are plenty of teams (even playoff teams) who could use that. On a very reasonable contract too. But then...i don't really see the Habs moving him, as nobody is going to throw them crazy value that's impossible to turn down...he's not that kind of goaltender. And frankly, the Price situation is far from completely settled and reliable...so unless the Habs have some other sort of insurance in place, probably better to just hang onto him. Even in a rebuild, nothing is more demoralizing that incompetent goaltending. Don't want to go there.
Petry - Seems likely to be moved. Probably going to be a limited return though, between his contract years remaining, faltering a bit without Weber around to be "the guy" bearing the brunt of things...and from the sounds of it, some potential choosiness when it comes to destinations that will limit the plausible market for him. That always hurts value.
Savard or Edmundson - Edmundson could probably be moved. Not for much though, and probably better for the Habs to just hang onto him as a reliable veteran partner for someone. Savard on the other hand, his market has absolutely dried up. Habs are stuck with him too. Not even sure he's a candidate for a "change of scenery" cap swap at this point.