How to compare antique sold prices without mixing unlike sales
A useful antique price comparison records what sold, when it sold and what the reported amount includes. Keep asking prices and completed-sale records in separate groups, and write down why each object is comparable to yours.
Which sales should go into my comparison worksheet?
Choose records with enough object detail to assess a match. Save the original URL, the sale date, the stated condition and the seller's attribution. Label an unsold listing as an asking price rather than treating it as evidence of a completed transaction.
How should I handle different currencies and fees?
Keep the original currency and price in the record. Note whether fees are included or unknown. If you convert a currency, record the rate source and date separately so someone else can follow your calculation. Do not silently combine unlike amounts.
What if comparable objects have different condition?
Describe the differences in words rather than applying an unsupported percentage adjustment. A missing part, a repair or uncertain attribution may make a comparison unsuitable. If too few records match, report insufficient evidence instead of manufacturing a narrow range.
What should my worksheet include?
| Record | Include | Purpose or question |
|---|---|---|
| Sale record | URL, date and status | Sold or asking? |
| Object match | Maker claim, size, material, condition | What differs? |
| Amount | Original currency and fees | What is included? |