Methodology

1. Trust labels

• LIVE — fresh response from connected market feeds with real listings
• CACHED — served from short-lived cache within TTL
• DEMO — catalog estimate when live feeds are thin when feeds are thin or offline (never silent)
• OFFLINE — probe failed

2. Fair market value (FMV)

FMV is a robust central tendency of filtered ask and/or sold prices (median after outlier scrub). Grade multipliers on the card desk adjust the band for PSA/BGS tiers — they are not separate sold books unless comps are grade-specific.

3. Decision verdict

BUY / HOLD / GRADE / PASS blends best ask vs FMV, sold density, estimated fees (grading + ship), and gem-rate context. It is a desk heuristic, not a guarantee. See Disclaimer.

4. Sentiment & history

Sentiment uses ask/sold counts, spread, and short momentum. Price history prefers dated sold comps; otherwise a labelled synthetic series anchors on FMV so the chart never pretends to be audited tape.

5. Corrections

Use Report bad price on a card desk or email [email protected]. Check live systems on Status.