Few specimens exist today, and none have been up for auction since the last one sold for upward of $400,000. The 1851 12d Black Empress is far from the rarest Canadian stamp, but it still commands ...

The "Inverted Jenny," 1918, one of the rarest and most valuable stamps ... A week later, he sold them to Philadelphia stamp dealer Eugene Klein for $15,000 (around $317,000 today).

“Even back in secondary school, I was aware that stamps have value and can be bought and sold. I started off collecting stamps from all over the world, and Malaysian first day covers, to ...