The Cowboys aren't exactly shopping running back Julius Jones, but they've told teams that have inquired about him that he's for sale for the right price. Cowboys owner-GM Jerry Jones apparently is prepared to hitch his wagon to the team's other young running back, Marion Barber. Jones, who rushed for 1,084 yards, had just 65 carries in Dallas' final six regular-season games, but played well in the playoff loss to Seattle, rushing for 112 yards on 22 carries.