GT Black Series

• No coherent sold-price benchmark is available.

• Needs at least 5 comparable sold observations inside the 36-month market window.

• Needs at least two independent source providers in the benchmark window.

• Data Confidence must reach at least 68/100.

• Observed benchmark CAGR is +19.5% across the longest suitable 2–6 year comparison window.

• Recent transaction momentum versus the preceding period is +33.3%.

• Collector Evidence G contributes source-backed structural evidence from 2 independent sources; it does not substitute for transaction evidence.

• SCI 1.5 separates structural collectibility from evidence confidence: scarcity, collector significance and future relevance carry 75% of SCI; observable market factors carry 25%. Thin public-market evidence primarily reduces Confidence rather than intrinsic collector quality.

• Uncovered factors retain conservative neutral priors in the score model while their missing support remains visible in factor coverage and Evidence Confidence; they are never presented as equally evidenced facts.

• SCI 1.5 migration guard limits unsupported downward changes to 3 points and weak-intrinsic-coverage upward changes to 5 points during the September 2026 transition window. Evidence-backed halo sanity floors require all three structural factors to be covered.