The DOE once sold a large portion of a nuclear material processing plant and provided, via FOI, the site plans - foundations, locations, et al. Mainly it was stainless steel, a scrappers great find. The scrapper tried to contact DOE when he found out what it was and was told "A sale's a sale. You bought it. No takebacks." Eventually some national security agency noticed and tried to pry it back for free. I think he held fast and made a small amount extra for his trouble. He was very concerned as it could easily have gone onto a ship to be reassembled and used as a step up to building a functioning plant in a less friendly country under a scrap metal export license.