When figuring the value of a stamp, ask yourself two questions: “How rare is it?” and “What condition is it in?” Stamp catalog prices will give you an idea of the stamp’s rarity. However, the stamp may sell at more or less than the catalog price, depending on its condition. Stamp dealers categorize stamps according to their condition. A stamp in mint condition is the same as when purchased from the Post Office. Hinge marks on mint stamps can reduce value, which is why stamp mounts are recommended for mint stamps.
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