The 1868 1¢ Benjamin Franklin “Z Grill” is the Unicorn of U.S. Stamps. If stamp collecting had a mic-drop moment, this would be it. It was recently sold in 2024 by Bond King Bill Gross for $4.4 Million.

Rare stamps are usually valuable stamps! Some U.S. stamps are so rare and valuable, they’re widely admired and searched for by stamp collectors! Famous examples include the Inverted Jenny, the 1868 1¢ Z Grill, and many others