People who collect love all sorts of things. People who don't collect, are frequently puzzled by why things like little pieces of paper fascinate others who are willing to spend incredible sums to purchase them. The fact is that there is a market for rare postage stamps, and collectors will come from everywhere around the earth for the chance to add a one of a kind stamp to their private collections.

One example of a printing error creating a rare stamp is Britain's olive colored Queen Victoria's head. This stamp was printed in 1864 in Hong Kong. It was meant to be grayish brown. By mistake fifty-two sheets were printed olive. The original stamps sold for ninety-six cents Hong Kong. In 2012 a block of four sold for almost six point five million dollars Hong Kong.

The British Guiana 1 Cent Magenta is the result of a depletion of supply. The British Guiana postmaster ran out of stamps and could not wait on England to deliver more. He asked the newspaper to print some to cover him until the regular shipment arrived. A magenta stamp with black ink was the result. Postal employees were forced to initial them to prevent forgeries. The stamp sold at auction in 1980 for $850,000.

Mistakes happen when people get in a hurry. The Post Office Mauritius is a good example of this. In 1847 the wife of the governor of Mauritius was planning a ball. The post office had a special stamp issued just for the occasion. The stamp was used on the invitations, but instead of saying postage paid, the stamp read post office. In 2011 one of these twelve two pennies left sold for $1.6 million dollars.

The Inverted Jenny was the first air mail stamp. It was issued in 1918. The rare ones show the plane upside down. The mistake was easy to make at the time. The sheet of a hundred stamps had to pass through the press twice. One set was turned the wrong way on the second pass resulting in the error. It got out without anybody noticing. A block of four sold for $3 million in 2005.

The very first stamp was the 1840 Penny Black. It has the face of Queen Victoria in profile as seen during a 1827 London visit. The stamp was only circulated for one year because the background made the cancellation mark too hard to make out. It is believed that only two of these Penny Blacks still exist. One of them was recently purchased by an American for $5 million.

The most expensive stamp on the planet is the Treskilling Yellow. Green was the intended color for this Swedish stamp, but it turned out yellow. It has changed hands several times, recently for an undisclosed amount. According to the auctioneer the Treskilling Yellow is now the most expensive single stamp in the world.

It might be hard for some to see the wisdom of paying millions for a tiny piece of paper. For philatelists, who have the money and means, a rare stamp is a prize. There is no telling what another enthusiast will be willing to pay in the future.