All product names, logos, brands, and trademarks are property of their respective owners, and are used for identification purposes only. PopHunter is not affiliated with, endorsed by, or sponsored by The Pokémon Company, Wizards of the Coast, Konami, Bandai, Ravensburger, Disney, Riot Games, or any other game publisher or grading company.

PopHunter provides market data and analytics, not financial or investment advice.

Scanner Markets Portfolio Watchlist Sign in

Greg Brock Base #57 · Donruss (1989) | PopHunter

←Back to Baseball dashboard

Front

Greg Brock

Name: Greg Brock
Brand: Baseball
SKU: cmqepzg7k4sgdz814zr566gi3

Base

Donruss · #57 · 1989

eBaySearch Sold comps

PSA 10 $

—

PSA 10 Pop

—

Gem Rate

—

30D Change

—

Market data as of Jun 14, 2026

Opportunity

56.0

Collector

Collector score — upgrade to unlock

88.8

Collector to unlockUpgrade

Investor

Investor score — upgrade to unlock

88.8

Investor to unlockUpgrade

Speculation

Speculation score — upgrade to unlock

88.8

Investor to unlockUpgrade

See pricing to unlock Collector, Investor & Speculation scores

How this score is calculated

Opportunity Score

56.0

8 weighted signals

Scarcity20%

Demand15%

Value Gap15%

Sales Vol.10%

Gem Rate10%

Momentum10%

Supply10%

Age10%

100

Score drivers: grade price gap (70) and vintage age (100). Raw population data is not yet available for this card. Signals are mixed — no strong edge indicated at current prices.

Market

PSA10 / PSA9

—

Active Listings

—

PSA10 Mkt Cap

—

PSA 10 Price

—

30D PSA10

—

90D PSA10

—

Raw Price

30D Raw

0.0%

90D Raw

—

Prices by Grade & Grader

No pricing data available.

Population Reports

PSA Population

PSA 10

—

PSA 9

—

PSA 8

—

PSA 7

—

PSA 6

—

PSA 5

—

PSA 4

—

PSA 3

—

PSA 2

PSA 10 Price

PSA 9 Price

PSA 10 Population

Total Population

Opportunity Score

Active Listings

Similar Opportunities

Same Player

No image

Greg Brock #307 #307

1989 · Score

Greg Brock

Market

Prices by Grade & Grader

Population Reports

PSA Population

PSA 10 Price

PSA 9 Price

PSA 10 Population

Total Population

Opportunity Score

Active Listings

Similar Opportunities

Same Player

Alternative Population

Same Set / Product

Similar Price Range