$2,307,700 The Whole Country Is Red stamp, issued during China’s Cultural Revolution in 1968, is a famous philatelic rarity with an intriguing printing error. The stamp features a red map of China adorned with the golden words “The Whole Country Is Red.” Below the map, a worker, a farmer, and a soldier hold copies of Quotations from Chairman Mao. Notably, Taiwan is conspicuously absent from the red shading on the map. The face value of this unique stamp is 8 fen. Due to its scarcity and historical significance, it has become highly sought after by collectors, with auction prices reaching impressive sums. (Getty Images)