We do get a lot of questions about what makes a stamp (or stamp collection) worth money.
Basically, there are three factors:
Scarcity, Condition and Popularity… you can have a very rare stamp that is in great condition, but if no one collects it then it isn’t worth anything. On the other hand you can have popular stamp in good condition that is fairly common (like the Graf Zeppelin set from the US) that is readily saleable.
An inventory of the collection, if available, would be useful to see.
If you are taking pictures of the collection, take one of the entire collection as well as early pages of the US collection or other areas that the collector concentrated on.
Some areas are not very populare
There are some areas that are of little interest to us which we would not buy if they did not come with a better collection
Gold Foil Replicas (envelopes with "gold stamps" on them), Bundleware (multiples of common stamps, sometimes counted into bunldes of 100 and tied up with thread), United States Modern Mint Postal Stationery, Common First Day Covers, United States Commemorative Panels or Souvenir Pages, Austrian Black Prints, German Erstagblatts, Other Country Philatelic First Day Items, United Nations, Inexpensive Childrens' Collections (if you’re not sure, call us!). If it looks “manufactured” (lots of text in a fancy binder) then it probably doesn’t have much value.
Other areas can have more value
We find interest in most areas of the world, including United States, Canada and British North America, Italy and Colonies, Proof and Essays, Worldwide collections (A-Z collections). Right now we have customers for colonial material from Britain, France, Spain, Portugal, Italy and Belgium. Offices from these areas are needed also!