Used Utility Trailer with Reefer Unit for sale. Features: 53 ft. Length, Thermo King Precedent Reefer Unit, and more. Coopersburg & Liberty Kenworth has new trucks, used trucks, trailers, and parts for sale. Locations: Coopersburg, PA (near Allentown), Swedesboro, NJ (near Philadelphia), and TRP 068 (Pottstown, PA).