However, some autographs are just so valuable that they are worth up to millions of dollars! Read on to discover some of the most expensive autographs in the world, citing Under30CEO, Investopedia, ...

The most expensive baseball cards derive their value from a combination ... with a distinctive reflective pattern and serial numbering of 1/1. Autographed by Trout, the card represents the pinnacle of ...

The most expensive football cards feature early legends ... This card includes Mahomes’ autograph and the NFL Shield patch. Its record-breaking price reflects Mahomes' early success, including ...