what are the most valuable coins still in circulation?
['1943 Lincoln Head Copper Penny. ... ', '1955 Doubled Die Penny. ... ', '1969-S Lincoln Cent with Doubled Die Obverse. ... ', '1982 No Mint Mark Roosevelt Dime. ... ', '1999-P Connecticut Broadstruck Quarter. ... ', '2004 Wisconsin State Quarter With Extra Leaf. ... ', '2005-P “In God We Rust” Kansas State Quarter.']