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HeriBase Blog
Fresh perspectives for a collection that keeps growing.
Coin value guidesGrading & valuation
4 articlesCoin value guides
How to Tell If a Coin Has Been Cleaned: Signs, Photos & Buying Advice
Spot possible coin-cleaning damage with PCGS and NGC photo examples. Compare hairlines, die-polish lines and contact marks, and understand Details grades and value.
Coin value guides
Coin Grading Scale: Why Similar Coins Sell for Different Prices
Learn the PCGS coin grading scale from PO1 to MS70, compare wear and surface details, and see how grades and designations affect real auction prices.
Coin value guides
Coin Appraisal: From AI Identification to Expert Evaluation
Learn what a coin appraisal includes, compare fee examples, and choose AI identification, online expert review or physical authentication for your coin.
Coin value guides
What Makes a Coin Valuable to Collectors?
Learn what makes a coin valuable to collectors: rarity, demand, condition, mint errors, metal content, history and provenance, with sources and examples.
