If I were to trade Paul Pierce (which I don't like to) I would try this:
Celtics receive: Tyreke Evans, John Salmons and 1# pick
Kings receive:Paul Pierce, JaJuan Johnson and 1# pick
(might have to swap J. Johnson with Avery Bradley or add E'twaun Moore)
Why Celtics would do this: Tyreke Evans is a young scorer, Rajon Rondo would become the leader of the team. Kings have the 5th pick in the draft, which means Celtics could land Andre Drummond who would run perfectly with Rondo. a quick rebuild (Tear of the bandaid technique)
Why Kings would do this: they get rid off John Salmons bad Contract. They get a great leader and help on their SF position, and a proven winner. They get to stay in the draft, Johnson(and E'Moore) or Bradley. Sweeten the deal and it makes up for the prospect lost in Tyreke Evans.
what do you guys think?
PS: Sorry, grammar nazis

My main language is not english