College Hill Auto Sales is a purveyor of used automobiles. The business is located right on the corner of North 13th Street and Bushkill Drive, but the entrance -- a narrow alley between Elias Auto Repair and an electrical station -- is easy to miss. The company, owned by Bob Ziegnfuss, sells a wide variety of makes and models of cars and trucks, including GMC, Ford, Pontiac, Mazda, Volkswagen, Volvo and more.