CardElevator Value

Medium confidence

$430.46from 4 comps

4 clean comps · latest 89d ago · 0% spread. Comps are aging — value may have moved.

CardPSA 91

Star Ken Griffey Jr

1989 Upper Deck · Rookie

All grades

Market analytics

How this exact card and grade is actually trading, computed from every real comp we track.

Trade volume

30d · 4 in 90d

Liquidity

65/100

Moderately liquid

30-day momentum

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Recent avg vs prior 30d

What the same card is worth across every grade we track, and the step-up from one grade to the next.

What the same card is worth in each grade, from real comps. The arrow shows the step-up vs the grade below.

A CGC 9.5 sells for about 11x the raw copy (+953%), a $905 jump.

4 sales

eBay

Ken Griffey Jr HOF 1989 Upper Deck Star Rookie RC #1 PSA 9 MINT Seattle Mariners

Showing 4 comps

Graded supply across PSA, BGS, SGC & CGC

Population report

No grading census is available for this card yet. We add PSA, BGS, SGC, and CGC population data as we collect it.