Gym Heroes/#21/132Gembook Valuei·PSA 7As of Jun 15, 2026 · updated daily at 6:00 AM PT
Confidence Limited · weighted median of 4 verified sales
Fair range $12 – $26
Confidence Limited · weighted median of 4 verified sales
Fair range $12 – $26
Brock's Onix
$19#12556 Overall#706 in Gym Heroes▲ 0.1%SET · 30D
1ST EDITION · PSA 7G
Price History▲ 73.3%
Details
SetGym Heroes
Number21 / 132
Released2000
PSA population20
Price confidenceLimited
Fair range$12 – $26
Last sale$26 · Jun 13, 2026
Live listings0 · checked daily
Recent sales
4 verified · 8 shownJun 13, 2026eBay$26—
Feb 28, 2026eBay$21—
Dec 28, 2025eBay$12—
Aug 31, 2025eBay$8—
Apr 23, 2025eBay$17—
Live listings
No live listings right now. New eBay listings for this card appear here within a day of going up.
How we price this
Gembook Value is the weighted median of 4 verified eBay sales. Shill bids, unpaid items, and outliers are filtered out — the numbers you see actually cleared.