• Rare stamps collections include stamps from countries that no longer exist, are no longer valid, or are only commemorative and were never valid in the first place. Same thing for coins and banknotes, some you can only use to look at them.

    They’re items with scarcity… that is no always all that scarce, and there are a lot of scams going around. Some are fake, some are so good of a fake that are unique and valuable again… 🤷

    (but… “use the stamp to mail a letter”? What century is this? 😉)