Wildcard → Lag Board → Cal Ripken Jr
Cal Ripken Jr vs Ken Griffey Jr
1982 Topps Traded #98T against 1989 Upper Deck #1 — measured, not predicted.
Not currently priced Same era Baseball
- Ratio now
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- Baseline
- not established yet
- Vs baseline
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- Observations
- 0
- Ken Griffey Jr, 30d
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- Cal Ripken Jr, 30d
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Not enough observations to draw a history yet. The index records one ratio per pairing per scan; this chart appears once there are at least two.
Every recorded observation
Why these two
Ripken's 1982 Topps Traded #98T against the most-collected rookie of the era that followed it. The Traded set was sold as a boxed factory set rather than in packs, which gives it a different supply profile from a pack-pulled rookie.
What would make this wrong
That different supply profile cuts both ways: boxed-set survival rates are high, and a re-grading wave can change the population quickly. The two cards' scarcity profiles are not alike, so part of this ratio is structural.
How this is measured
Each scan records one number: the fair value of Cal Ripken Jr's 1982 Topps Traded #98T divided by the fair value of Ken Griffey Jr's 1989 Upper Deck #1, both from comparable sales. The baseline is the median of those observations over 90 days — excluding the most recent 21, so a fresh move cannot drag down the very number it is being measured against. Below 8 observations there is no baseline and this page says so instead of showing one.
The baseline is never authored. It is the median of what was recorded, or it does not exist. Nobody types a target ratio into this system.
This is an observation about a historical relationship, not a forecast. A gap that never closes means the market permanently re-rated Cal Ripken Jr rather than temporarily forgot him — that is the risk in every pairing here, and it does not mean-revert on a schedule.