Gym Heroes/#21/132Gembook Valuei·PSA 10As of Jun 14, 2026 · updated daily at 6:00 AM PT
Confidence Limited · weighted median of 8 verified sales
Fair range $285 – $333
Confidence Limited · weighted median of 8 verified sales
Fair range $285 – $333
Brock's Onix
$285#3091 Overall#98 in Gym Heroes▼ 0.2%SET · 30D
1ST EDITION · PSA 10G
Price History▲ 185.0%
Details
SetGym Heroes
Number21 / 132
Released2000
PSA population53
Price confidenceLimited
Fair range$285 – $333
Last sale$285 · Mar 30, 2026
Live listings0 · checked daily
Recent sales
8 verified · 16 shownMar 30, 2026eBay$285+$0
Mar 18, 2026eBay$333+$48
Mar 15, 2026eBay$405+$120
Feb 22, 2026eBay$300+$15
Feb 11, 2026eBay$278−$7
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 8 verified eBay sales. Shill bids, unpaid items, and outliers are filtered out — the numbers you see actually cleared.