2) yes. At this point in time it would have to be a pretty good trade package to trade Bargnani in my opinion.
3) Bargnani trade package would have to revolve around lotto pick, solid rotational player on good contract, and financial relief (an expiring contract or two).
BONUS: If adding Dirk would make them a contender, I would say Dirk. However he wouldn't therefore Bargnani based on contract, age, and the tapping of potential we are all witnessing.