Gotta wonder how much input Kemba, Smart, Jaylen and Jayson had on Ainge's opinion of Turner. They played and practiced together for an entire summer. Turner wasn't good on that Team USA squad, eventually leading to his benching and insertion of Brown as a big over Turner.
If those four didn't like Turner personally or as a teammate in a professional manner, that could explain Ainge's reluctance to add Turner to this team. It would explain Ainge needing to shop Turner. Ainge's lack of love for Turner could have nothing to do with salary and everything to do with not wanting to anger his core players by bringing in someone they wouldn't want to play with. Though, his high salary for an MLE level talent probably had something to do with it....maybe.