Top 10 Rarest/Expensive Pokemon Cards
#4
Raichu PRERELEASE Error Print $10,500+
Arguably the rarest card printed by Wizards. Rumored to have been about 6 to 50 made, some of which were retrieved by Wizards themselves. These cards came about during the printing of prerelease Clefable from Jungle, when some Base Set Raichu cards were attached to the side of sheets of Clefable cards. Wizards staff denied their existence for years, but have since confessed to the card's existence.
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http://everybestof.com/55-Expensive+Pokemon+Cards
http://bulbapedia.bulbagarden.net/wiki/Error_cards
http://everybestof.com/55-Expensive+Pokemon+Cards