Another active buyer in trade talks, the Mavericks, haven’t pushed hard for Kevin Martin in their conversations with Sacramento, sources say. That’s an indication that the Mavs are focused on another wing who’d fit their needs – Washington’s Caron Butler. How aggressively the Wizards look to unload contracts as they try to pick up the pieces from Gilbert Arenas’ suspension depends on how a fundamental internal disagreement is resolved. Some elements of the Wizards’ power structure favor “completely blowing it up,” according to one source, while others are holding out for a more patient approach. “How badly does Dallas want Caron Butler?” one rival executive said. “Washington will find out.” The Mavs have not been pushing for Antawn Jamison in their talks with the Wizards, believing they have enough 30-somethings on the roster.