| 1. Match the car as closely as possible | Year, model, body style, engine, transmission, and market region | Confirm details from the vehicle identification, registration, or historical records. Do not treat different body styles or specifications as direct comparables. | Give the greatest weight to completed sales of cars with the closest specification and location. |
| 2. Compare guide values with completed sales | Valuation-guide date and condition category; auction sale date and final recorded price | Use completed transactions rather than asking prices. Record the guide’s valuation date because market values can change over time. | Compare several recent, relevant sales with the guide figure; investigate large differences rather than assuming either figure is definitive. |
| 3. Adjust for condition | Body, chassis, paint, interior, mechanical condition, and completeness | Look for corrosion, accident repairs, worn components, missing parts, and evidence of restoration. An inspection and a detailed condition report are more useful than appearance alone. | Compare cars in similar condition. Treat a project car and a road-ready example as separate categories. |
| 4. Check originality and restoration records | Original components, replacement parts, restoration scope, invoices, and photographs | Verify which components are original and whether restoration work is documented. A claimed restoration should be supported by records where possible. | Use documented work to understand condition and maintenance history; do not assume restoration cost is fully reflected in resale value. |
| 5. Verify identity and provenance | Chassis or identification numbers, ownership history, registration, and supporting documents | Check that identifying numbers are consistent across the car and its paperwork. Resolve gaps or discrepancies before purchase. | Give less confidence to price comparisons when the vehicle’s identity, history, or specification cannot be verified. |
| 6. Put auction prices on the same basis | Currency, sale date, published price basis, buyer fees, taxes, and transport costs | A reported sale price may not include every fee or expense. Auction terms differ, so check what the published result includes. | Compare like with like: use the same currency and distinguish the recorded sale price from additional purchase costs. |
| 7. Set a maximum offer after inspection | Comparable sale range, inspection findings, immediate repairs, parts availability, and ownership costs | Obtain an independent inspection and estimate urgent repairs before bidding or making an offer. Confirm that parts and specialist services are accessible. | Base your limit on the car’s verified condition and total expected cost, not on a guide value or one exceptional auction result alone. |