Penske Used Trucks is currentlyselling 12-foot and 16-foot box trucks across the U.S. that come with a special $1,500 discount and a complimentary 6-month extended warranty. Penske is also offering a great deal on medium-duty trucks, with the opportunity to select one of two sales: a $3,000 discount; or a $1,500 reduction and a 6-month, 25,000-mile warranty.