I could see why Pittsburgh would covet cheap young prospects on the cusp. They need that infusion of youth badly, and soon...if they want to make anything of Sid's last good years.
But from Buffalo's end...i'm not sure how much they have that would really make a lot of sense. I get that maybe the Sabres are sick of losing and being stuck in this perpetual rebuild and would have some interest in good solid veterans to help right the ship. But how many of those does Pittsburgh have to spare?
-Pettersson is almost certainly more of a "rental" that will go to a contender, and a LHD where Buffalo are loaded up already anyway.
-Rakell, Rust both have some manner of Trade Protection.
-Malkin isn't going to Buffalo.
-Karlsson isn't at all the sort of defenceman they need and Letang isn't likely going anywhere.
-Graves is an extremely tough contract to move and another LHD anyway.
What else is there even? Beyond that, it's mostly just...filler guys, fringe guys, players trying to establish themselves...which is basically what Buffalo's overstaffed with in the first place.