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Ask about Brock's Onix [1st Edition] #21 from Gym Heroes
Brock's Onix [1st Edition] #21 Pokémon card from Gym Heroes

Brock's Onix [1st Edition] 21/132

Gym Heroes

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Brock's Onix [1st Edition] #21 from Gym Heroes currently trades at $14.50 raw, with PSA 10 copies reaching $285.00 — a 19.7x grade premium.
Current Prices (USD)
Ungraded
$14.50
PSA 7
$23.97
PSA 8
$24.04
PSA 9
$60.58
PSA 10
$285.00
ACE 10
—
BGS 10 Black
$1,855.00
CGC 10 Pristine
$107.00
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Raw Price Trend
7d
—
30d
—
90d
-1.7%
180d
-10.7%
1y
+41.9%
2y
+38.1%
5y
+60.0%

Quick price facts

Brock's Onix [1st Edition] 21/132 from Gym Heroes has a current raw market value of $14.50.

Current raw value
$14.50
PSA 9 value
$60.58
PSA 10 value
$285
PSA 10 premium vs raw
19.7× raw
View all cards from Gym Heroes →
Collector Intel
19.7x
Raw → PSA 10
High-risk grade
4.2x
Raw → PSA 9
Grade multiplier

Calculated from price history, PSA population data, and market trends. Not financial advice.

Grading Calculator

Based on PSA Standard tier (~$25 USD). Assumes a perfect PSA 10 result — actual outcome depends on card condition.

⚠️ High-variance grade. PSA 10 is 20x the raw price. The expected value accounts for the realistic probability.
$15
Buy Raw
~$25
Grading Fee
PSA Standard
$285
PSA 10 Value
+$246
Best Case (PSA 10)
if you pull a 10
Grade Multiples vs Raw
PSA 9$614.2x raw
PSA 10$28519.7x raw

Frequently asked questions

How much is Brock's Onix [1st Edition] #21 from Gym Heroes worth?+
Brock's Onix [1st Edition] #21 from Gym Heroes is currently worth Raw: $14.50, PSA 9: $60.58, PSA 10: $285 based on recent sold listings. Prices update daily from real eBay sales.
Is Brock's Onix [1st Edition] #21 worth grading?+
The PSA 10 price of $285 is 19.7× the raw price of $14.50. After a ~$25 grading fee, a PSA 10 result would net approximately $271 — assuming the card grades a 10.
Where do PokePrices Brock's Onix [1st Edition] #21 prices come from?+
Prices are tracked nightly from real sold listings on PriceCharting (raw, PSA 9 and PSA 10). PSA population data is sourced from PSA's public reports. We do not use asking prices — only confirmed sales.

Recent verified sales

Find this card on eBay →Affiliate · we may earn commission
  • 26 Jul 2026Raw
    tcgplayercompleted-auctions-usednear mint
    $4.50
  • 24 Jul 2026Raw
    tcgplayercompleted-auctions-usednear mint
    $17.48
  • 21 Jul 2026Graded
    ebaycompleted-auctions-newunknown
    $26.69
  • 21 Jul 2026Graded
    ebaycompleted-auctions-gradedunknown
    $74.00
    best offer accepted
  • 17 Jul 2026Raw
    tcgplayercompleted-auctions-usednear mint
    $19.99