Vintage
Brock's Onix
Gym Heroes · #21 · English · released 2000
Raw market price
$13.56
7 days
▲ 2.3%
30 days
▲ 4.9%
90 days
▲ 6.8%
Graded prices & PSA population
| Grade | Market price | PSA population |
|---|---|---|
| PSA 10 | $315 | 53 |
| PSA 9 | $54 | 140 |
| PSA 8 | $41 | 76 |
PSA population recorded 2026-07-20 · total graded 299
Why this card matters
pop
Graded premiums are real (PSA 10 is ~43x raw) but 79 listings and tiny comp samples (n=1–2) reflect low trading velocity rather than genuine scarcity.
demand
Brock is a recognized Gym Heroes character but Onix is a secondary, non-iconic Pokémon with limited collector pull beyond set completionists.
artist
Standard Gym Heroes holo illustration with no notable alt-art distinction or artist cult following to drive premium desirability.
catalyst
30-day momentum is negative at -7.1% with no identifiable event, reprint threat, or market dislocation to reverse the trend.
Graded comps on record
$315
PSA 10
$70
CGC 10
$54
PSA 9
$41
PSA 8
$34
SGC 9
$24
PSA 7
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More from Gym Heroes
Market data recorded 2026-07-10 from licensed market sources. MASTER records prices daily and never invents a number — estimated values are always labeled. Not financial advice.