The quick answer
Coins, currency, and stamps need exact identification before value: issue, date, mint or printing details, grade, originality, rarity, and demand all matter.
Start with identification
For coins, document both sides, date, mint mark, denomination, metal, weight, and edge. For stamps, show front, back, perforations, gum, cancellation, and watermark if known.
Condition and grade
Small condition differences can change value sharply. Cleaning, trimming, tears, stains, folds, repaired gum, and replica risks need to be disclosed.
When appraisal helps
Collections with scarce issues, inherited albums, high face-value groups, suspected errors, or mixed world material may need expert triage before sale.
Market evidence
Use market evidence that match exact issue, grade, certification status, originality, and sale venue. Visual similarity alone is not enough.
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