MARTIN TRACTOR IS OFFERING THIS 2012 JOHN DEERE S680. SOME OF THE MAIN OPTIONS INCLUDED ON THIS COMBINE INCLUDES THE FOLLOWING: 2WD, PREMIUM CAB, PREMIUM RADIO, GS3 TOUCH SCREEN, PRO DRIVE TRANSMISSION, MULTI-SPEED FEEDERHOUSE, 22.5' UNLOAD AUGER, 520/85R42 FRONT DUALS