10. A Nazi Riddle
The Enigma machine is an encryption device used during the mid-20th century to protect commercial, diplomatic, and military communication. Scramble alphabet letters using a rotor mechanism. During World War II, Nazi Germany employed this practice extensively among all military branches.
One employee found an enigma machine in one of the bundles that came through at a recycling plant. This garbage has undoubtedly become a gem, as it was later discovered as worth $10,000. A wealthy collector of history most likely took up the extremely rare discovery.