Paul Fraser Collectibles has listed the exceedingly rare Plate 77 Penny Red stamp from 1864 for £650,000 ($844,000).

A rare version of the Plate 77 Penny Red stamp sold for £550,000 in 2012. ... The test sheets came out with imperfections and were destroyed, but a small number ended up in circulation.

THE RED CROSS STAMPS. Share full article. Feb. 2, 1909. Credit... The New York Times Archives. See the article in its original context from February 2, 1909, Page 8 Buy Reprints. View on timesmachine.

For example, United States stamps ranked number 1 in used stamps with 538 items showing an average 25 -year appreciation of 906.7% but was ranked as number 10 for its mint stamps with only a 373.9 ...