The Rarest Stamps in The World

This is the rarest and most expensive stamps in the world :

1. The Three-Skilling Yellow, $2.3 million.
2. The first two Mauritius stamps, $1,148,850.
3. The inverted Jenny, US$977,500.
4. British Guiana One Cent Black on Magenta, $935,000.
5. U.S. Franklin Z-Grill, $930,000.
6. Hawaiian Missionaries, $760,000.
7. The Penny Black, $3,000