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.

The Rarest of the Rare The British Guiana 1¢ Magenta is the “Mona Lisa” of stamps. Printed in 1856 during a supply shortage, this one-of-a-kind oddball was born out of necessity—and ended up becoming the world’s most famous stamp.