Mercury dimes are a favorite series for many collectors of 20th-century United States coinage and are commonly collected by date and mintmark, much like other series from the middle of the 20th century. Mercury dimes enjoy brisk sales on the eBay auction site, though for the most part the series is not considerably expensive to complete as a set, at least in circulated grades. Only a few issues in the Mercury dime series are categorically rare, and by far the most sought-after of the scarce issues is the 1916-D Mercury dime.
Take a look at the top eBay sales of Mercury dimes from September 2014 and you'll see a good mixture of high-end common dates, circulated key dates, and a few minting varieties. Perhaps most interesting about the Mercury dimes on this list are the number of super-grade pieces – those that grade Mint State 67 or higher.
The Mercury dime, or Winged Liberty Head dime as numismatic aficionados refer to the type, is a classic silver coin that was struck during the years 1916 through 1945 and has remained a popular collectible to this day. The Mercury dime, designed by Adolph A. Weinman, remains on top of many collectors’ lists not only as a type coin for rounding out 20th century coin sets and birth year sets, but also a coin to be collected as a series.