1924 $20 Saint-Gaudens Double Eagle PCGS MS66+. Yes, one of the most commonly encountered dates for the $20 Saint-Gaudens series that ran from 1907 to 1933, but considering exactly how many remaining survivors there most be out of the original mintage of 4.3 million – and then figuring how many are certified in MS66 or better – it’s clear to understand why these coins are in such great demand. PCGS has certified slightly over 300,000 coins in all grades but only 166 in MS66+ with a mere 107 in higher grades! The PCGS published price is $3,650. Further, if we take the average price both NGC AND PCGS MS66+ coins have realized at public auction in 2017 (8 coins considered), the price realized is $2,785.