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Ask about Brock's Onix #21 from Gym Heroes
Brock's Onix #21 Pokémon card from Gym Heroes

Brock's Onix 21/132

Gym Heroes

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Brock's Onix #21 from Gym Heroes currently trades at $8.09 raw, with PSA 10 copies reaching $121.50 — a 15.0x grade premium.
Current Prices (USD)
Ungraded
$8.09
PSA 7
$9.00
PSA 8
$11.27
PSA 9
$22.17
PSA 10
$121.50
ACE 10
—
BGS 10 Black
$790.00
CGC 10 Pristine
$23.00
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Raw Price Trend
7d
—
30d
—
90d
+15.7%
180d
+15.7%
1y
+35.1%
2y
+35.1%
5y
+179.9%

Quick price facts

Brock's Onix 21/132 from Gym Heroes has a current raw market value of $8.09.

Current raw value
$8.09
PSA 9 value
$22.17
PSA 10 value
$122
PSA 10 premium vs raw
15.0× raw
View all cards from Gym Heroes →
Collector Intel
15.0x
Raw → PSA 10
High-risk grade
2.7x
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 15x the raw price. The expected value accounts for the realistic probability.
$8
Buy Raw
~$25
Grading Fee
PSA Standard
$122
PSA 10 Value
+$88
Best Case (PSA 10)
if you pull a 10
Grade Multiples vs Raw
PSA 9$222.7x raw
PSA 10$12215.0x raw

Frequently asked questions

How much is Brock's Onix #21 from Gym Heroes worth?+
Brock's Onix #21 from Gym Heroes is currently worth Raw: $8.09, PSA 9: $22.17, PSA 10: $122 based on recent sold listings. Prices update daily from real eBay sales.
Is Brock's Onix #21 worth grading?+
The PSA 10 price of $122 is 15.0× the raw price of $8.09. After a ~$25 grading fee, a PSA 10 result would net approximately $113 — assuming the card grades a 10.
Where do PokePrices Brock's Onix #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
  • 2 Aug 2026Raw
    ebaycompleted-auctions-usedlightly played
    $6.00
  • 26 Jul 2026Raw
    tcgplayercompleted-auctions-usednear mint
    $4.50
  • 25 Jul 2026Raw
    tcgplayercompleted-auctions-usednear mint
    $8.58
  • 24 Jul 2026Raw
    tcgplayercompleted-auctions-usednear mint
    $17.48
  • 22 Jul 2026Raw
    ebaycompleted-auctions-usedunknown
    $8.00