The world's first postage stamp was issued by Great Britain in 1840. Featuring a bust of Queen Victoria, it has come to be known as the "Penny Black." It also marked the introduction of "uniform penny postage" in a mail system: the rate to carry a letter to ANY destination within the country was now the same, and not based on distance carried.
The 2d Tyrian Plum is one of the most celebrated postage stamps of Great Britain and a key stamp in any rare stamp investment portfolio. Available from Paul Fraser Collectibles for $133,000. (Payment in GBP 85,000)
Rare Stamps that made History : http://www.stampssale.com/rare-stamps-made-history/