Gym Heroes/#21/132Gembook Valuei·PSA 8As of Jun 15, 2026 · updated daily at 6:00 AM PT
Confidence Limited · weighted median of 4 verified sales
Fair range $28 – $40
Confidence Limited · weighted median of 4 verified sales
Fair range $28 – $40
Brock's Onix
$40#9479 Overall#425 in Gym Heroes▲ 0.1%SET · 30D
1ST EDITION · PSA 8G
Price History▲ 150.0%
Details
SetGym Heroes
Number21 / 132
Released2000
PSA population74
Price confidenceLimited
Fair range$28 – $40
Last sale$40 · Apr 7, 2026
Live listings0 · checked daily
Recent sales
4 verified · 17 shownApr 7, 2026eBay$40+$0
Mar 10, 2026eBay$28−$12
Feb 23, 2026eBay$40+$0
Nov 30, 2025eBay$13−$27
Jul 8, 2025eBay$34−$6
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.