The 1937 Antietam half dollar is a very popular commemorative issue with collectors. The original mintage was 50,028 coins although 32,000 were melted as unsold at the original issue price of $1.75. So the original mintage distributed to collectors is actually 18,028. Probably 12,000 to 15,000 of the original distributed mintage still survives today, nearly all of those survivors now grading MS63 to MS66. The Antietam has traditionally sold for a premium over the price of other commemorative issues with similar original mintages and survival rates in Choice and Gem condition. Perhaps this is due to some Southern regional chauvinism as it is a Civil War battle anniversary being commemorated.
Most Antietam are very nice. The average grade is MS64 to MS66. Antietams usually have great original luster or attractive toning. They don't seen to suffer from the unattractive "yellow" toning syndrome that effects a few of the other silver commemorative issues.