Stateline Auto Brokers on busy Washington Street is a used auto sales business that specializes in automobiles with under 6,000 miles. It stands by its vehicles with honesty and the Massachusetts state warranty. It has been in business for more than 25 years and stocks both domestic and foreign makes and models. It also offers a free Carfax report with every vehicle, so you know the complete history of your automobile before you make a decision to purchase it.