Here is just a possible trade with the Raptors to help the Celtics for the future:

Rajon Rondo and the Clippers 1st for Barbosa'a expiring contract, the rights to Jonas Valanciunas and their 1st round pick. The Raptors would like an All-Star player to lead them, and the Celtics would like to gain a potential All-Star power foward and a top 10 pick. I am not sure if this deal is fair for the Raptors because they are giving up a lot, but I want to see what you guys think.