bgs-grading-system

name	bgs-grading-system
description	Use when submitting to BGS or evaluating BGS grades. Covers sub-grades, Pristine 10, Black Label, and the BGS 9.5 vs PSA 10 economics.

BGS Grading System

BGS publishes 4 sub-grades (centering, corners, edges, surface). Pristine 10 requires all 4 = 10. Black Label = Pristine + perfect every axis.

Sub-grade math

Overall grade follows the LOWEST sub-grade with a half-step round:

• 9-9-9.5-9.5 = 9.5
• 9.5-9.5-9.5-10 = 9.5
• 10-10-10-10 = 10 Pristine
• 10-10-10-10 + every back axis perfect = 10 BLACK LABEL

Black Label hits roughly 1 in 100,000 modern subs.

9.5 vs PSA 10 market

Era	BGS 9.5 sells at	PSA 10 advantage
Modern Pokemon	0.5–0.7× PSA 10	PSA dominant
Modern sports rookie	0.6–0.8× PSA 10	PSA dominant
MTG modern	0.9–1.1× PSA 10	BGS preferred
Pristine 10 (sports)	1.0–1.5× PSA 10	BGS premium
Black Label	3–8× regular Pristine	BGS unique

When to choose BGS

Choose BGS when:

1. Card is a Pristine 10 candidate (all 4 sub-grades likely 10)
2. MTG submission (collector preference)
3. Customer wants sub-grade transparency
4. Card has 1 weak axis — BGS half-grades smooth the hit

Where this fits in the X3 empire

Used in Crossover Arbitrage tool to evaluate crack-and-resubmit candidates.