ex-RAF pilot Guy Harris put a toilet seat up for auction that he claimed to have removed from Hitler's bunker in Berlin. He said he had found it in the private apartment used by Hitler and Eva Braun.
According to Harris, he and other British soldiers had been allowed in the bunker by the Russians, who had already removed everything they believed to be of value. But they evidently hadn't thought Hitler's toilet seat was of any value. So Harris took it.
When he got back to England, he first installed it in his 90-foot yacht on the Thames. Later he moved it to his home in Twickenham, before finally deciding to sell it.
There's no record, however, of whether he did manage sell it. At least, none that I can find.
Albany Democrat Herald - Dec 18, 1969
Los Angeles Times - Dec 17, 1969
As it turns out, Harris wasn't the only soldier to have nabbed a Hitler toilet seat. There are two more floating around out there. One was taken from Hitler's mountain retreat, the Berghof. The other from Hitler's private yacht, the Aviso Grille. This latter one is currently located in an auto repair shop in New Jeresy. More info: Anchorage News