Please keep Prince. You are overrating him. Both players, Jefferson and Prince are of the same age. Prince is now playing on a weak team that is the Detroit Pistons. We give up the 20th pick for a lateral swap. Prince is going to have a lesser role in SA, if he is traded here and his numbers would reflect that.
He is putting up numbers on the 7th worst team in the NBA, and not even putting up that much, even though his effiency increased only because he lowered his touches, on a bad team. By my count, Jefferson averaged at least 19 points on the Milwaukee Bucks in the 2008-2009 NBA season, with Bogut out and his team was the 10th worst team. Jefferson will be worth way more at the trade deadline because he is also an expiring contract at 15 million dollars.