How to Determine the Value of a Stamp

Stamp collecting is a globally popular hobby, with enthusiasts appreciating everything from the aesthetic design of stamps to their rich historical background. Understanding the monetary value of stamps can help you appraise them more accurately and set realistic expectations when deciding to sell.

Assess the centering of the design. The more centrally the stamp is positioned within the white borders, the better. You want the stamp to appear well-balanced and sharp overall.

Flip the stamp over and inspect the gum on the back. The gum is the adhesive used to stick the stamp onto paper. You want this adhesive to be in the best possible condition, free from breaks or creases.

Examine the stamp hinge. A stamp hinge is a small, transparent folded paper strip coated with a thin layer of adhesive, sometimes attached to the back of the stamp and used to mount it in an album. The presence of a hinge can reduce the stamp's value, even after removal. If your stamp has a hinge, consult an expert or stamp dealer before attempting to remove it yourself, as you might cause further damage.

Check the sharpness of the perforations. Perforations are the small holes punched along the edges of the stamp, allowing it to be torn from the sheet. Some stamps have more perforations or larger circular holes, but the key is to ensure the perforations are complete and sharply defined.

Look for a cancellation mark. If a stamp has been used, it will bear a cancellation mark on its face. The heavier the cancellation mark, the lower the stamp's value; ensure the stamp is free from smudges or marks that obscure its design.

Evaluate the stamp's color. You want the design to be vibrant and bright. Faded colors can result from factors like sunlight, artificial light, dirt, pollution, or oils from skin contact.

Identify the type of stamp. Based on the design's centering and the intensity of the cancellation mark, you can determine the stamp's category. Grading levels (stamp condition) range from poor, average, good, very good, to superb. A stamp with poor centering and heavy cancellation marks will score closer to 'poor,' while a 'superb' rating is rare, as the stamp must be flawless in every aspect.

Leave the stamp on the envelope if it's affixed. Removing or cutting it risks damaging the stamp. Sometimes, an old stamp on an envelope with a unique cancellation mark can be more valuable than an unused, unmounted stamp. Consult a stamp show expert or professional appraiser to decide whether to remove it.

Determine the stamp's age. Easier said than done! You can estimate the age by examining design clues, historical events, or text on the stamp. The exact year is rarely printed, making it hard to pinpoint the stamp's age. Seek help from professional stamp dealers if needed. Older stamps are generally more valuable, so the effort is worthwhile. Stamps printed within the last 70 years, even if pristine, may not be valued higher than original issues.

Identify the country of origin. Look for historical figures, events, or text on the stamp—knowing the language can help narrow it down. For example, an image of Queen Victoria might indicate a 19th to early 20th-century British stamp, while the Hoover Dam could suggest a mid-20th-century American stamp.

Use reference books to identify a stamp. Depending on the stamp, you might find it easier to identify before determining its age and country of origin. After assessing the physical condition, you’ll have enough information to consult reference materials. American collectors often use the Scott Specialized Catalogue (also available digitally), while British philatelists rely on the Stanley Gibbons catalogue. Visit your local library to see what resources are available. Online sources and catalogues exist, but they may lack the reliability and accuracy of printed references.

Determine the rarity of the stamp. Rarity depends on the stamp's age and the quantity of its initial print run. The rarer the stamp, the higher its value; some collectors argue that rarity is the most critical factor in determining value, even more than condition or age. Consult reference books or professional dealers to learn about the stamp's original print run. An old stamp isn’t necessarily rare or valuable. For example, the 1861 Benjamin Franklin 1-cent stamp isn’t highly valuable because around 150 million were produced.

Look for error stamps. While you typically want your stamps to be as perfect as possible, error stamps are an exception. These rare stamps have design flaws beyond issues like centering or perforations. Error stamps are highly valuable due to their scarcity; only 50 or 100 might exist. Valuable errors include design mistakes, such as incorrect borders on a map; omissions, like the missing Thatcher Ferry Bridge; or inversions, such as the famous upside-down Jenny stamp.

Refer to reference books or online sources to determine the stamp's value. Now that you’ve identified the stamp and any condition flaws, revisit reference materials to estimate its worth. Look for up-to-date price guides specifically for postage stamps. While price guides aren’t always precise, they’ll give you a rough idea of your stamp’s potential value.

Attend stamp exhibitions. These events occur globally, offering a platform for philatelists to buy, sell, and appraise their stamps. Stamp dealers often list these exhibitions on their websites, and you can check the American Philatelic Society (APS) or the American Stamp Dealers Association (ASDA) websites to find an exhibition near you. Bring your stamps and seek multiple opinions.

Find a stamp appraisal expert. In the U.S., look for a stamp dealer who is a member of APS or ASDA. Flip through your directory to the 'Stamp Collectors' section or search online for a local stamp dealer and inquire about appraisal fees. This process is quick and provides the most accurate estimate of your stamp's value.

• To locate a stamp dealer in other countries, search online. Organizations like APS, although a U.S.-based group, often list dealers (as well as stamp exhibitions) in other countries, such as Canada and the United Kingdom.