Blue Knob Auto is an automobile dealer specializing in preowned cars. The company, based in Duncansville, Pa., offers a range of makes and models of cars including Acura, Audi, BMW, Cadillac, Chevrolet, Chrysler, Dodge, Ford, GMC, Honda, Hummer, Hyundai, Infiniti, Suzu, Jagaur, Jeep, Kia, Lexus, Lincoln, Mazda, Mercedes, Mercury, Mini, Mitsubishi, Nissan, Oldsmobile, Plymouth, Pontiac, Porsche, Saab, Scion, Saturn, Subaru, Suzuki, Toyota, Volkswagen and Volvo. The company offers universal underwriters extended service contracts. It accepts trade-ins that provides car buyers and sellers with price estimations of the current value of cars. It also provides its customers with financing information.