The 1933 gold Saint-Gaudens $20 coin is the most valuable coin the world. The only legal 1933 double eagle sold at auction in 2002 for a whopping $7.5 million dollars! Ours is a 24kt gold clad tribute proof in an airtight acrylic holder with presentation box. Minted under the strictest quality standards and struck multiple times for razor sharp design details and a brilliant finish.