I bought a used Curtis Toledo Econo-Line twin cylinder air compressor. 80 gallons tank, 3 HP 220V Baldor motor. Also included was belt guard, air regulator of some sort, and air hose. Pictures of me included for size comparison. The compressor is about 6 feet tall.
It cost me $350.
See also the Air Manifold that I made for distributing compressed air to the air dryer and the basement.