| name | psa-9-to-psa-10-multipliers |
| description | Use when valuing PSA 9 vs PSA 10 across categories. The multiplier is the most important card-pricing variable.
|
PSA 9 to PSA 10 Multipliers
PSA 10 multiplier varies 2× to 50× over PSA 9. Modern Pokemon is steepest (5-15×); vintage sports flatter (2-4×).
Multiplier by category
| Category | PSA 10 vs PSA 9 |
|---|
| Modern Pokemon | 5-15× |
| Modern Magic | 2-5× |
| Vintage Pokemon WOTC | 8-20× |
| Modern sports rookies | 3-8× |
| Vintage sports (pre-1980) | 2-4× |
| Modern Bowman 1st | 5-12× |
| Modern parallels /50 | 4-10× |
| 1/1 cards | N/A (auction discovery) |
Why multipliers vary
- Collector base preference (Pokemon collectors prioritize perfect; vintage collectors more lenient)
- Pop scarcity at 10 (lower pop = higher multiplier)
- Liquidity at 9 (less liquid = compressed 9 price, wider multiplier)
- Print quality (foil/chrome amplifies surface defects, fewer 10s)
- Era expectations (modern requires perfect; vintage forgives)
Submission strategy
High-multiplier categories: submit only confident 10 candidates. Modern Pokemon, vintage Pokemon WOTC, Bowman 1st — careful pre-screen.
Low-multiplier categories: submit borderline cards. Vintage sports (PSA 8 still strong), modern parallels (PSA 9 acceptable).
Where this fits in the X3 empire
Drives Crossover Arbitrage tool EV calculations.
