Valuation
How to Value Stamps and Stamp Collections
The value of a stamp depends on far more than its catalogue price. Condition, genuine scarcity and current demand all matter, and catalogue value is a guide rather than the price a stamp will sell for. This hub explains how stamp valuation really works, how to weigh a whole collection, and what makes a stamp worth what it is. You are also welcome to send us clear photographs by email for a free, honest valuation.
At a glance
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Catalogue value is not the selling price
The most useful thing to understand
A guide, not the price
A catalogue value, such as a Stanley Gibbons price, is a guide. It reflects a fine example bought from a dealer, and it is useful for comparison, but it is not what a stamp will sell for. Think of it as an insurance or replacement value, the cost of replacing a stamp from an official source, rather than the price you would receive for selling one.
In practice, the price a stamp actually realises is usually a fraction of its catalogue value, and it depends heavily on condition and on whether anyone wants it just then. A collection that adds up to a large figure in the catalogue can be worth a good deal less in the hand. This is not a trick of the trade; it is simply how the market works, and knowing it is the first step to a realistic valuation.
What makes a stamp valuable
Four things matter most. Rare stamps are genuinely rare; good-value stamps have usually had good value spent on them. Stamps are about enjoyment first, and value follows the things below.
- Condition. A sound, well-centred, fresh stamp is worth far more than a faulty one. For mint stamps, never-hinged gum often carries a premium. Faults, repairs and regumming all reduce value.
- Genuine scarcity. How many survive, not simply how old a stamp is. Many old stamps are very common, and age alone does not make a stamp valuable.
- Demand. What collectors actually want at the moment. A scarce stamp that few people collect may still be inexpensive.
- Authenticity. A stamp must be genuine, and for valuable items an expert certificate gives certainty.
I have inherited a collection, what should I do?
One of our most common questions
Do not assume, and do not damage it
First, do not assume a collection is worth either a fortune or nothing. Both happen, but most inherited collections sit somewhere in between, and a great deal of bright, bulky material is common or cancelled to order, which is worth less than it looks. There can also be real value hidden in unpromising-looking pages, which is exactly why it is worth checking.
Second, do not damage it. Do not soak stamps off paper, do not pull stamps from albums, and do not try to clean anything. Leave the collection exactly as it is.
Third, get an honest valuation before you do anything. You are welcome to send us photographs for a free assessment, with no obligation.
Get a free valuation
Send us clear photographs by email, and we will give you a free, honest valuation, with no obligation to sell. The aim is simple: to help you understand what you have, and to get the most for it.
No obligation
Send us photos for a free valuation
Photograph the whole collection or album pages so we can see the scope, and add closer pictures of anything that looks better or unusual. We will tell you honestly what we think it is worth, and the best way for you to sell it.
Email daniel@blackheathstamps.co.uk. As valuations are free, we reply as soon as we are able.
Selling, honestly
If you decide to sell, we will give you a straight answer. We will happily make you an offer if you would like one, but we will not pretend we can match an auction on genuinely scarce material. A dealer has to make a profit, while an auction can let dealers and collectors compete for your collection, and where that would serve you better, we will tell you so and point you in the right direction.
It is a slower way to do business than simply buying everything, and we think it is the honest one.
Frequently asked questions
Value comes from condition, genuine scarcity and demand, with catalogue value as a guide rather than the selling price. You can send us clear photos by email for a free, honest valuation.
No. Catalogue value is a guide based on a fine example bought from a dealer, much like an insurance replacement value. The price a stamp actually realises is usually a fraction of it, depending on condition and demand.
Possibly, but age alone does not make a stamp valuable, as many old stamps are common. Scarcity, condition and demand are what count.
Do not damage or sort it, and do not assume its value either way. Get an honest valuation first; you are welcome to send us photos.
Yes. Send clear photographs by email and we will give you a free, honest valuation with no obligation.
We will make you an offer if you would like one, but we will generally point you to auction where it would get you more. Either way, you will get honest advice.
Looking to buy rather than sell?
Browse our Great Britain stamps, or explore the full shop.
Founder and stamp dealerLast updated June 2026