Shaun Livingston is playing regularly for the Cavs, isn't he?
I don't think you could get him for a protected 2nd rounder. I think you need to give up a good 2nd round pick to get S.Livingston. He is of value to the Cavs. Small value but value nonetheless.
I would be happy to land S.Livingston. Solid backup PG and with his ability to defend multiple positions, he would be a nice addition alongside Boston's smaller guards. Although, that would probably limit his ability to create mismatches on the other end and lower his offensive worth. Hmm ...