Rare 1870 Carson City $20 gold coin sells for $1.44M at California auctionOnly 3,789 of these $20 Double Eagle coins were produced, and experts estimate that just 40 to 50 of these rare coins still exist.(photo credit: The Portable Antiquities Scheme, Daniel Pett, 2011-04-15 17:21:20 is licensed under CC BY-SA 4.0. Vi)
