Methodology
Evidence, never blended.
| Class | Meaning | Example |
|---|---|---|
| Fact | Recorded, sourced, timestamped. | A completed sale |
| Signal | Measured from facts. | Sales per week |
| Estimate | Modelled, with a range. | Fair-value range |
| Forecast | Speculation, labelled. | Release-driven demand |
Rules
- Sold beats listed. Values rest on completed sales.
- Grade is identity. A PSA 10 and a raw copy are different markets.
- Every number is sourced and flagged when stale.
- Authorized data only. Nothing invented.
- Thin data says so. No confident score without evidence.
Target Lock math
- Resale − safety margin
- − selling fee, processing, shipping to buyer = net proceeds
- − grading, profit target, shipping to you = budget
- ÷ (1 + premium) × (1 + tax) = max price
Whole-cent arithmetic. Costs round up, the ceiling rounds down. Open the calculator