Look Up Scott or Gibbons Catalog Values
2 hoursIdentify each stamp by catalog number and note mint and used catalog values.
Field context
This workflow is part of 4 niche fields
Complete guide for philatelic valuation — step-by-step workflow, tools, checklist, and expert tips to get started.
Identify each stamp by catalog number and note mint and used catalog values.
Assess centering, perforations, gum, cancellation, and faults for each stamp.
Check eBay sold listings, StampAuctionNetwork, and dealer pricelists for realistic values.
Sum collection value by category; note high-value items requiring individual insurance riders.
Apply condition factor percentages to catalog values for realistic market valuation.
Compile valuation report with catalog numbers, grades, and estimated market values.
Assess rarity factor based on stamp age and known print quantities.
Attach condition photos to valuation report for insurance documentation.
Multipliers applied to catalog value by grade.
| Grade | Factor | Description |
|---|---|---|
| Superb mint NH | 1.5–2.0× | Perfect centering, fresh gum |
| Fine mint NH | 1.0× | Catalog baseline |
| Fine used | 0.20–0.30× | Light cancel, intact perf |
| Damaged | 0.05–0.10× | Tears, thins, heavy cancel |
eBay asking prices mean nothing — filter by completed/sold listings for real market data.
A $50 expertizing fee on a $500 stamp prevents selling a fake for $500 or buying one.
Stamp collections in estates may require professional appraisal — IRS Form 8283 for donations over $5,000.