As far as I am aware the Tirpitz is property of the German government. What title does this company have to the metal? Metal recovered by divers - is this legal?
I does sound to me rather like the scam that has been going around for years about buying a piece of the Moon. It is a scam because nobody owns the Moon, by international agreement no property rights pertain to the Moon.
If you don't own it you can't legally sell it.
''Give me a Ping and one Ping only'' - Sean Connery.