Trading Ray for a package of Salmons, Hinrich, and Thomas would mean no title this year, and no title next year, whereas just keeping Ray would still give us a chance. Salmons and Hinrich are both mediocre players at best. Thomas is going to end up bouncing around the league before he finds his place, if ever. I'd rather go all out for one more title by keeping Ray, rather than gamble and risk not getting another shot at a title.
Like others have said, if it's not a deal which includes Iguodala, Martin, or Ellis, i would not trade Ray period.