Sox simply are not going to trade Colome or Bummer if the return isn't strong. There is no reason to. Same thing for Leury.
Guys like Nova, Jay, Castillo, even Herrera if someone is crazy enough to think he'll rebound, I assume will be moved for salary relief or low level lottery tickets if that is offered. Maybe Yolmer is in that category now as well at this point.
McCann is an interesting one. Sox clearly love him - but if someone wants to pay up for his current production, you definitely have to consider moving him.