Stamp Value: How to Find Out What Your Stamps Are Worth

9 min read

“How much are my stamps worth?” is the question every collector, and everyone who inherits a collection, asks sooner or later. The honest answer is that most stamps are worth very little, a few are worth a lot, and you can work out which is which with a methodical approach and some patience. This guide walks through the process collectors and dealers use.

Start With Realistic Expectations

Postal services have printed hundreds of billions of stamps. The vast majority were printed in huge numbers, were saved by millions of people, and are worth a few cents each — sometimes less. Age alone doesn’t make a stamp valuable: the Penny Black is the world’s first stamp and instantly recognisable, yet around 68 million were printed, and ordinary used examples sell for modest sums.

What makes a stamp valuable is a combination of scarcity, demand and condition. A stamp that few people kept, that many collectors want, in excellent condition, is where the value lies.

Step 1: Identify the Stamp

You can’t value a stamp until you know exactly what it is. Note down:

Country. Look for the country name, which may be in the local language or script — Helvetia for Switzerland, Magyar Posta for Hungary, Nippon for Japan. Some British stamps show only the monarch’s head and no country name at all.
Denomination and currency. The face value printed on the stamp.
Approximate year. From the design, the monarch or ruler shown, the currency or the postmark date.
Design details. Colour, subject and any inscriptions.

With these you can find the stamp in a catalogue and note its catalogue number — for example its Scott number in the US. Many stamps were issued in several versions that look almost identical, so check for the details in Step 3 before settling on one.

Step 2: Judge the Condition

Condition can change a stamp’s value many times over. A perfect example of a stamp may be worth ten times an average one. Examine each stamp under good light with a magnifier and check:

Centring. How evenly the design sits within the margins. Well-centred stamps are worth considerably more.
Perforations. All teeth present and intact? Short or missing perfs reduce value.
Faults. Look for thins (hold the stamp up to light), tears, creases, stains and fading. Any fault reduces value sharply.
Gum (unused stamps). Never hinged stamps with full original gum are worth the most; hinged, partial or no gum less. Beware regummed stamps — gum added later to pass as original.
Cancellation (used stamps). A light, neat cancel that leaves the design clear is preferable to a heavy smudge. For some issues, a clear dated postmark adds value.

Our stamp grading guide explains the grades dealers use, from Superb to Poor.

Step 3: Check for Varieties and Errors

Two stamps that look the same can differ in value enormously because of a detail you need to look for deliberately:

Watermark. Many older stamps exist with different watermarks. See watermark detection.
Perforation gauge. The same design may exist in several perforation measurements, one far scarcer than the others. See how to use a perforation gauge.
Shade. Some issues were printed in distinctly different shades, catalogued separately.
Errors. Inverted centres, missing colours, missing perforations. See our guide to error stamps.

A variety that the catalogue lists separately can be worth many times the common version — so check before you decide a stamp is ordinary.

Step 4: Look Up the Catalogue Value

Stamp catalogues list each stamp with a value for mint and used examples. The major catalogues are:

Scott — the standard in the United States, covering the whole world.
Stanley Gibbons — the standard in the UK and for British Commonwealth stamps.
Michel — widely used in Germany and across Europe.
Yvert et Tellier — the standard in France and for French-speaking countries.

Printed catalogues are expensive, but public libraries and stamp clubs often have copies, and digital editions are available.

Catalogue value is not what a stamp sells for. It is a guide to relative value, usually for a stamp in good condition. Common stamps typically sell for a small fraction of catalogue value, and catalogues set a minimum value that reflects a dealer’s cost of handling a stamp rather than what you would be paid for it. Only genuinely scarce stamps in fine condition regularly sell at or above catalogue.

Step 5: Check What Similar Stamps Actually Sold For

Real sales tell you more than any catalogue:

Online marketplaces. Search for your stamp and filter to sold or completed listings. Asking prices tell you nothing — anyone can list a common stamp as “rare”.
Auction houses. Many philatelic auction houses publish prices realised from past sales, which is the best evidence for valuable stamps.
Dealer price lists. Dealers’ selling prices show the top of the market; what they pay is usually considerably less.

Compare like with like: the same catalogue number, the same mint or used status, in similar condition.

Step 6: Get Expert Help for Valuable Stamps

If your research suggests a stamp is worth a significant amount, get a second opinion before buying, selling or insuring it.

Expert certificates. Valuable stamps are routinely examined by recognised expert committees, such as the Royal Philatelic Society London’s Expert Committee, the Philatelic Foundation in New York or the American Philatelic Society’s expertising service. A certificate confirms whether a stamp is genuine and describes its condition, and serious buyers expect one for expensive stamps.
Reputable dealers and auction houses. Look for membership of a national dealers’ association. Get more than one opinion.
Your local stamp club or philatelic society. Members are usually generous with their knowledge and can tell you quickly whether a collection merits professional attention.

Signs a Stamp Might Be Valuable

None of these guarantees value, but they are worth a closer look:

Stamps from the classic era, roughly before 1900, in fine condition.
Early airmail, high denominations and short-lived issues.
Stamps with clear errors or listed varieties.
Complete covers with unusual routes, rates or postmarks.
Unused older stamps with full original gum.

Warning Signs

“Rare” in an online listing. It almost never is.
Reprints and forgeries. Many classic stamps were reprinted or forged — sometimes very convincingly. Expensive stamps without a certificate deserve caution.
Repairs. Filled thins, added perforations and repaired tears are designed to be hard to spot.

What About a Whole Collection or Album?

If you have inherited a collection, don’t start by valuing every stamp individually — and don’t remove stamps from the albums. Instead:

Look through the albums for the oldest stamps, anything that looks unusual and any complete covers.
Make a simple inventory: countries, approximate dates, roughly how many stamps.
Get offers or valuations from more than one reputable dealer or auction house.

Collections are usually sold as a whole or in lots rather than stamp by stamp. Our page for people who have inherited a stamp collection covers the process in more detail.

What About Modern Unused Stamps?

Modern unused stamps rarely sell above face value, and often sell below it. But many are still valid for postage in the country that issued them — so using them on your own mail can be the best return. Check with your postal service, because some countries have withdrawn older designs from use.

Keep Records as You Go

Whatever you find, write it down: what each stamp is, its condition, its catalogue number and any sale prices you found. A clear record saves you repeating the research, helps family understand the collection, and gives a dealer or auction house everything they need. Stamp Atlas is building a stamp identifier and digital catalogue to make that record quicker to keep.

Glossary terms used in this guide

Centering — Centering describes how well a stamp's printed design sits within its margins and perforations; a perfectly centred stamp has equal margins on all four sides.
Face Value — Face value is the postage value printed on a stamp — the amount it is worth for paying postage — as opposed to its market or catalogue value to collectors.
Forgery — A forgery is an imitation of a genuine stamp, overprint or postmark made to deceive — either the post office, to avoid paying postage, or collectors, to sell a copy as genuine.
Mint — A mint stamp is an unused stamp in the condition in which it was issued by the post office, with full original gum and no cancellation.
Never Hinged — Never hinged (NH) describes a mint stamp whose original gum has never been disturbed by a stamp hinge or any other mounting.
Original Gum — Original gum (OG) is the adhesive applied to a stamp at the time of printing, as opposed to gum added later; its presence is a key value factor for unused stamps.
Regummed — A regummed stamp has had new gum applied to its back after issue, usually to make a stamp with no gum or disturbed gum appear to have original, never-hinged gum.
Reprint — A reprint is a stamp printed from the original plates or dies after the stamp was no longer current or valid, usually for collectors or official reference rather than postage.
Scott Number — A Scott number is the identification number assigned to a stamp by the Scott Standard Postage Stamp Catalogue, the most widely used stamp catalogue in the United States.
Thin — A thin is a spot where some of a stamp's paper has been lost from the back, usually when a hinge or paper was pulled off, leaving the stamp thinner and weaker at that point.
Variety — A variety is a stamp that differs in a recognisable, usually minor, way from the normal version — such as a shade, plate flaw, re-entry, paper or perforation difference.