The Faberge Eggs
The Russian royal family owned 50 bejeweled eggs, made by The House of Fabergé in 1885. During the Russian overthrow of the Zhar and his family, the eggs had disappeared.
Source: documentarytube.com
Yet when word got out that each one is worth more than one million dollars, they all of a sudden reappeared. Well, only seven of them did. Maybe the other 43 owners of these eggs are waiting for the value to go up before declaring they found one too!