th control or other services.RICHMOND, Va.Rare nickel sells for $3.1MFour Virginia siblings who never let a rare 5-cent piece slip through their fingers, even when it was declared a fake, have been rewarded for their devotion to a humble family heirloom after the century-old coin sold for more than $3.1 million.The 1913 Liberty Head nickel, one of only five known to exist, was sold to two bidders