Value begins with correct identity and changes with originality, condition, provenance, desirability, venue, date, and transaction terms.
Build a matched comparison set
Use completed sales when available. Compare the same object type, maker or region, period, dimensions, materials, decoration, surface, completeness, condition, provenance, and sale venue.
Do not average unlike objects
A museum-quality labeled piece, an attributed example, a later revival, a refinished object, and a reproduction may share a visual style but belong to different markets.
Account for transaction structure
- Buyer premiums, taxes, shipping, crating, pickup and restoration costs.
- Retail, auction, dealer, private, estate, wholesale and insurance contexts.
- Sale date, location, photography, cataloging, guarantees and return rights.
- Whether the result was sold, passed, withdrawn, returned or disputed.
Value types are not interchangeable
| Purpose | Typical question |
|---|---|
| Fair market | What might a willing buyer and seller agree to under ordinary conditions? |
| Retail replacement | What may it cost to replace through an appropriate retail source? |
| Auction estimate | What range supports a particular sale strategy? |
| Wholesale or dealer | What allows room for carrying cost, expertise, risk and resale? |
Asking-price rule: An active listing proves that someone asked a price. It does not prove a sale, authenticity, condition, or value.
Compare current collector listings
Use listings to study construction, dimensions, maker marks, regional details, repairs, provenance claims, and market supply. Asking prices are research leads, not completed-sale evidence.
Search eBay collector listings