Greg Maddux Base #9 · Upper Deck Black Diamond (1999) | PopHunter

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Front

Greg Maddux

Name: Greg Maddux
Brand: Baseball
SKU: cmqet3j8y9o1bz814hkm1nvdd

Base

Upper Deck Black Diamond · #9 · 1999

Parallel:DoubleBase

eBaySearch Sold comps

PSA 10 $

$34

PSA 10 Pop

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Gem Rate

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30D Change

0.0%

Market data as of Jun 14, 2026

Opportunity

53.8

Collector

Collector to unlockUpgrade

Investor

Investor to unlockUpgrade

Speculation

Investor to unlockUpgrade

See pricing to unlock Collector, Investor & Speculation scores

How this score is calculated

Opportunity Score

53.8

8 weighted signals

Scarcity20%

Demand15%

Value Gap15%

Sales Vol.10%

Gem Rate10%

Momentum10%

Supply10%

Age10%

100

Score drivers: vintage age (100). PSA 10 population data is not yet available for this card. The PSA 10 price is 2.4x PSA 9, which may be low for a card with this scarcity profile. Signals are mixed — no strong edge indicated at current prices.

Market

PSA10 / PSA9

2.37x

Active Listings

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PSA10 Mkt Cap

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PSA 10 Price

$34

30D PSA10

0.0%

90D PSA10

—

Raw Price

30D Raw

0.0%

90D Raw

—

Prices by Grade & Grader

Population Reports

PSA Population

PSA 10

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PSA 9

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PSA 8

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PSA 7

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PSA 6

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PSA 5

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PSA 4

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PSA 3

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PSA 2

PSA 10 Price

PSA 9 Price

PSA 10 Population

Total Population

Opportunity Score

Active Listings

Similar Opportunities

Other Parallels

No image

Greg Maddux #9 #9

Double

1999 · Upper Deck Black Diamond

Same Player

PopHunter surfaces potentially undervalued scarcity and relative value signals. This is not financial or investment advice. Always do your own research before buying, selling, or grading cards.