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Write a concise report on why vintage collectibles can retain value over time. Cover scarcity, condition, provenance, collector demand, market cycles, and the risks of assuming past appreciation will continue. Use a few well-known examples from coins, trading cards, or art.
Created artifacts/report.md and a short README.
The report covers all requested factors with eight source links and distinguishes facts, inferences, uncertainty, and unanswered questions. Local structure and coverage checks passed. Files remain untracked.