Here is the top 20 of the most rare, expensive and valuable US stamps, sold on public actions and ranged by price.
1. $345,000.00, December 2010, Cherrystone. Inverted jenny, 24c carmine rose and blue, center inverted, position 22 (C3a)
2. $165,000.00, March 2006, Cherrystone. United States 1893 4c blue, error of color, n.h. imprint block of four (233a, cat. $145,000)
$55,000.00. September 2005, Cherrystone auction. US Air Post 1911 25c “Vin Fiz”, unused, one of only three copies known unused (CL2, cat. $35,000)
4. $43,451.00, June 2016, eBay. The Sc 296a Deep Red-Brown and Black MN OG inverted stamp with a PSE certificate.