Here's something to look forward to if you are passionate about stamps. Did you know that on June 17, 2014, the most popular stamp in the world will be offered in an auction to be hosted by Sotheby's New York? There are other 'rare and pricey' stamps out in the market, but for many hobbyists and enthusiasts who are into philately, the British Guiana One-Cent Magenta is considered the most important single stamp in the world. This stamp has been sold three times on the market, and for the past three tries, this stamp managed to fetch a record price for a single stamp.