Markets
Ken Griffey Jr.
1989 Upper Deck
1
10
closingBaseballseeded
Griffey 1989 Upper Deck #1 PSA 10
Will the benchmark close below $2,050?
A liquid nostalgia card with broad retail recognition and enough graded supply to keep manipulation risk lower.
Benchmark
$2,075
Line
$2,050
Current index
$2,040
Market score
88
Benchmark trend
Resolves May 20, 2026Hard gates
10+ verified sales in 90 days
passMeets launch liquidity floor after outlier review.
Variance under 40%
passRecent comp band is inside the publish threshold.
Population source present
passGraded population snapshot is attached to the evidence pack.
Evidence ledger
| Source | Signal | Value | Quality | Note |
|---|---|---|---|---|
| OCDB seed | Catalog identity | 1989 Upper Deck #1 | Q82 | Resolver fields are staged for the POC and ready to map to open-card-catalog output. |
| Reddit/YouTube seed | Demand pulse | High | Q74 | Seeded collector attention signal used until the live adapters run on a schedule. |