Sac-town wouldn't do that trade anyway, not even to move Salmons. They certainly wouldn't just trade Salmons for Bass salary-wise.
Rondo for Cousins is a coup for the Celtics. There are 30 passable point guards in the NBA today, 10 in the vicinity of Rondo. There are 15 good centers in the game and 5 in the vicinity of Cousin's talent.
Maybe if we threw in AB there could be a discussion but from the perspective of a Celtics fan I'm not ready to go there. I think (and I'm pretty close to alone) that we have the best starting back court in the NBA one AB gets back. We'll see if I'm a homer come January.
I want to steal Cousins badly but we just don't have the resources and if we do it would put us into full blown rebuild. I'm sure Cousins would love that