Vintage
Brock's Onix
Gym Heroes · #21 · English · released 2000
Raw market price
$15.29
7 days
▲ 2.4%
30 days
▲ 11.1%
90 days
▲ 21.3%
Graded prices & PSA population
| Grade | Market price | PSA population |
|---|---|---|
| PSA 10 | $526 | 53 |
| PSA 9 | $67 | 140 |
| PSA 8 | $16 | 78 |
PSA population recorded 2026-09-05 · total graded 303
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
$526
PSA 10
$68
CGC 10
$67
PSA 9
$34
SGC 9
$29
CGC 9.5
$24
PSA 7
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More from Gym Heroes
Market data recorded 2026-08-29 from licensed market sources. MASTER records prices daily and never invents a number — estimated values are always labeled. Not financial advice.