September 16, 2019 – The most valuable United States modern coin ever sold at auction, a 1975 proof No S dime, changed hands twice in less than a week, both times for record prices.
The finer of the two known 1975 proof dimes without the San Francisco S mint mark was jointly purchased on September 6, 2019 for $456,000 by modern coin specialist Mitch Spivack along with his son, Justin, owner of MonsterCoinMart in Orange County California, and with collector Steven Heller also as a partner on the deal. They then sold it five days later through agent Nick Cascio for $516,000 to an avid Roosevelt dime collector who wants to remain anonymous
