So, I missed the 2019-S Enhance Reverse Proof sale this morning...but I saw this listing of US Mint's page:
https://catalog.usmint.gov/holiday-...nce-_-111519"Last Chance
Going, going.almost gone! There's not much time left to purchase these beautiful keepsakes or to share them as gifts this holiday season. If you're interested in the stunning 2019 American Legion 100th Anniversary commemorative coins, the curved coins in the 2019 Apollo 11 50th Anniversary commemorative program, or any of the other Last Chance items, don't miss your final opportunity to own these before they go off sale forever! 2019 Commemorative products go off-sale on December 27, 2019 at midnight ET. All other Last Chance products go off-sale on December 31, 2019, at 11:59pm ET."
There are 5 groups of coins to consider (in order of priority):
1) Commemoratives (gold and silver), which will end on December 27, 2019 at midnight ET. Watch for the number of the Uncirculated versions.
2) Annual Sets (Mint Set, Proof Set, Silver Proof Set, etc), which will end on December 31, 2019, at 11:59pm ET. The highlight is actually in the special
Lincoln Cent.
3)
ATB 5oz, which will end on December 31, 2019, at 11:59pm ET.
4) American Silver Eagle and American Gold Eagle, which will end on December 31, 2019, at 11:59pm ET.
5) Other products (coins in NOT mentioned above packaging), which can be suddenly ended on December 31, 2019, at 11:59pm ET. For example, those Congratulation Set of previous years.