When (people) think of WWII surplus, most people think of vast field of airplanes in Arizona - and for good reason. Theu probably have in mind the much photographed Storage Depot 41 at Kingman, Arizona, though it was only one of many storage depots for surplus plane, and not the largest either.

At Kingman and elsewhere, the WAA (War Assets Administration) offered flyable models at cut-rate prices...
Rugged B-17s often turned up as crash-test airplanes for the military, and some as water-bombers for the Forest Service.One Flying Fortress ended up delivering telephone poles on remote South American lannding strips; the poles were loaded and unloaded through a hole in the tail cone.

James R Chiles "How the Great War on Surplus Got Won - or Lost"
Smithsonian, Dec 1995