The NBA holiday shopping season is upon us a little early this year. It usually starts December 15, the first day players who were signed in the offseason become eligible to be traded. But after seeing Rudy Gay’s immovable contract somehow sent from Toronto to Sacramento, it is clear that shopping season is under way. Come next Sunday, NBA general managers will have increased flexibility when looking to improve their rosters, which was Kings GM Pete D’Alessandro’s approach in acquiring Gay, or their payroll,