Record the exact sales you found, use one shipping rule, compare condition groups, and show how closely each sale matches the card being researched.
Confidence describes the checks you completed. It does not verify the sale for you.
A sale for the same player can still be a poor comparison when the set, card number, parallel, autograph, serial numbering, or condition differs. Keep those differences visible instead of averaging them away.
Use at least three completed sales. Nothing entered here is fetched or independently verified.
Enter at least three completed sales and choose Analyze evidence.
Up to ten sessions stay on this device. They are not uploaded.
No saved sessions yet.
Every calculation stays tied to the evidence entered by the collector.
Confirm the exact card and read how completed-sale evidence should be interpreted.
It summarizes completed sales entered by the visitor. It calculates a median, average, observed range, possible IQR outliers, condition groups, and a transparent evidence-confidence score. It does not fetch or verify sales.
Use one method consistently. Including buyer-paid shipping compares the amount paid for the item and delivery. Item-only mode can be useful when every source reports shipping differently. The tool lets the collector choose and labels the result.
The score uses only the collector's checks. An exact card match contributes 60 points, matching condition contributes 25 points, and confirming the result as a completed sale contributes 15 points. It is a research-completeness score, not independent verification.
No. With at least four included sales, the lab flags values outside the standard 1.5 times interquartile-range rule. The collector decides whether a flagged result is still valid evidence.
Match the exact card, review completed sales, and separate observed results from assumptions.