Rare Australian stamps can range from a few hundred dollars to eye-watering five-figure sums, with the true unicorns occasionally clearing $100,000 at auction. Mint (unused) examples generally fetch more than used (postmarked) ones—especially with original gum, crisp perforations, and neat centring—while used values improve with light, tidy cancels. The big drivers are scarcity, condition, demand, and provenance, and they all matter more than your uncle’s tall tale about a shoebox in the shed. For a sensible ballpark, compare recent realised prices from Australian auction houses and classifieds, and check the latest ACSC catalogue for specialist guidance. If you’re sitting on something that looks special—errors, proofs, high denominations—get a written appraisal from a reputable philatelic dealer. In short: mint brings the premium, tidy used can still be a gem, and the market will happily punish creases, thins, and heavy hinges.
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