what are rare baseball cards?
['1909 T206 Honus Wagner. Price: $3.12 million. ... ', '1952 Topps Mickey Mantle. Price: $2.88 million. ... ', '1951 Bowman Mickey Mantle. Price: $750,000. ... ', '1916 Sporting News Babe Ruth. ... ', '1963 Topps Pete Rose. ... ', '1909 T206 Eddie Plank. ... ', '1909 American Caramel E90-1 Joe Jackson. ... ', '1909 T206 Sherry Magee (Error)']