The valuation of any item is subject to a variety of factors some of which appear universal and others which are unique to the product. This is true for investment grade postage stamps but, to make a ...

has a couple of ideas, and you might even be able to pick the items up at your local post office. A real bargain is the 2009 "Postal Service Guide to U.S. Stamps." At $19.95, this spiral-bound, glossy ...