Stacker Trailer For Sale. 49 Foot 2012 United triple 8000# axle. Very clean with low miles. Includes a 16ft four post lift and hoist inside, with built in cabinets up front. Trailer is set up to haul 4 cars, with roadside doors on each side in addition to rear doors. My plans have changed and I no longer have a need for the trailer, which is located in Portland Oregon. Please see the pictures and attached build sheet. $39,900.