12 Rare u0026 Valuable Proof Sets Worth Money YOU Should Be Checking

1999-2001.1999-2008.1999-2008-2009.1999-20082009.1999-2009.1999-2010.1999-2011.1999-2016.1999-2017.1999-2020.1999-2021.1999-2021-silver. 2013 US Mint Limited Edition Silver Proof Set 8 Coins with Box COA and Sleeve.