The joy of collecting can be enhanced by joining with other philatelists to exchange duplicate stamps. As you become more and more involved with this wonderful hobby, you will become increasingly aware of the value of being able to obtain truly unusual and valuable postage stamps. For example, the world's most renowned or most valuable stamp is known as the famed 1856 British Guiana one-cent magenta. At that time it was the highest price ever paid for a single philatelic item at a public sale. No second copy has ever been verified.
Most philatelists specialize their collections either by country or by theme.
There are many subjects from which to choose. There are also many publications and organizations with which to become associated to enhance your study. I am always more than happy to answer your questions and direct you to sources other than my own. The current rates for postage went into effect on Jan 01, 1995. First class postage being 32 cents for the first ounce or fraction thereof, and 29 cents for each additional ounce or fraction thereof.