DoD Rolling stock contract refers to end of life Military eqpt on wheels. The parts required by special bases are first stripped and the rest marked for collection. It is a highly specialized market often relying on military retirees. There are restrictions on sales and specialists who know how to circumvent them.
A killing is made when your client , like a foreign nation , desperately wants certain parts in bulk.This is not a open market . The bidding spiked when the bidder was quietly approached by a buyer and DOD had the parts. Its as simple as that.