What's your copy worth?
What this price is based on
High confidence49 sales in 90 days, closely clustered.
What each version actually sells for
Every figure is the median of real completed sales whose listing claimed that printing and condition — not a percentage of the headline price. A dash means we haven't seen enough sales of that exact version to publish one.
Recent Raw sales
- Aug 14, 2026eBay — Brock's Onix 21/132 Rare Gym Heroes Pokemon Unlimited NMNMUnlimited$9.99
- Aug 12, 2026eBay — Brock's Onix 21/132 Rare Gym Heroes Pokemon Unlimited Moderately PlayedMPUnlimited$6.99
- Aug 8, 2026eBay — Brock's Onix 21/132 Rare Gym Heroes Pokemon Unlimited Lightly PlayedLPUnlimited$7.92
- Aug 8, 2026eBay — Brock's Onix 21/132 Gym Heroes Unlimited LP PokemonLPUnlimited$9.89
- Aug 3, 2026eBay — Brock's Onix 21/132 Rare Gym Heroes Pokemon Unlimited LPLPUnlimited$8.99
- Aug 3, 2026eBay — Brock's Onix 21/132 Rare Gym Heroes Pokemon Unlimited Heavily PlayedHPUnlimited$6.99
- Aug 2, 2026eBay — Brock's Onix 21/132 Rare Gym Heroes Pokemon Unlimited Lightly PlayedLPUnlimited$7.43
- Jul 29, 2026eBay — Brock's Onix 21/132 Rare Gym Heroes Pokemon Unlimited NM-NMUnlimited$7.99
By grade
- Raw$7.1849 sales
- PSA 10$1114 sales
- CGC 9$19.002 sales
- PSA 8$10.501 sale
- PSA 1$5.001 sale
- Lot$8.401 sale
- CGC 7.5$16.801 sale
From 59 completed sales recorded between May 1, 2024 and Aug 14, 2026. Sold prices only — asking prices are never counted. The range is wide because these sales span different printings and conditions — 1st Edition, Shadowless and Unlimited copies all carry this card's name, and they trade at very different levels. Each sale above is labelled with what its listing claimed, so you can see which ones describe the same object. Treat the median as the typical copy, not the range.
Grade it or not
NOT WORTH ITBased on 9 graded sales and 1,889,841 pop-report entries for a near-mint copy.
See the numbers — Trader plan and aboveBuy this card
✨ Is it worth it?
An AI market read of this card — value, momentum, grading economics, liquidity. It lays out the data; you decide.
Brock's Onix is a Rare Pokémon card from Gym Heroes (#21), illustrated by Benimaru Itoh. It's a Basic Fighting-type Pokémon with 70 HP, weak to Grass ×2. Its current blended market value is $11.66 ungraded, with a PSA 10 worth around $141 — a gem-mint grading premium of roughly 12× the raw value. Prices are aggregated across marketplaces — raw and graded, updated daily and shown in your local currency.
Prices last updated 20 August 2026.
The receipts
Graded a PSA 10? See its cert-verified sales and price history → — individual sales PSA tied to a specific slab, each with a cert number you can check.
Price history · Raw
We'll email you when this card's value crosses your target.
Verified sales history10 in 90 days✓ real completed listings
| Date | Grade | Price | Cert |
|---|---|---|---|
| 6 Aug 2026 | PSA 8 | $24.00 | #132337379 ✓ |
| 4 Jul 2026 | PSA 10 | $387.25 | #98364294 ✓ |
| 8 Apr 2026 | PSA 8 | $10.50 | #146737440 ✓ |
| 21 Mar 2026 | PSA 7 | $18.00 | #74322091 ✓ |
| 15 Mar 2026 | PSA 10 | $405.00 | #49979233 ✓ |
| 8 Jan 2026 | PSA 10 | $121.48 | #57828936 ✓ |
| 3 Aug 2025 | PSA 7 | $13.00 | #104921497 ✓ |
| 1 Aug 2025 | PSA 7 | $17.99 | #104921497 ✓ |
| 25 Jul 2025 | PSA 9 | $17.50 | #102241861 ✓ |
| 27 Jun 2025 | PSA 9 | $24.99 | #99346635 ✓ |
Should you grade it?
Expected return across every likely grade, after fees — the realistic average, not the best case. Only 18.3% of copies gem (PSA 10 best case +$58); most land at PSA 9 or below.
The odds
Brock's Onix is a Rare in Gym Heroes — the pack's hit slot lands on Rare 67% of the time, split across 23 rare cards in the set, so pulling this exact card is roughly 1 in 34 packs.
Estimates only. Pack odds come from CardTrack's pack model (the same one behind the pack simulator) — not an official rate. Grading odds are the real cumulative PSA population, which skews toward nicer, resubmitted copies, so it overstates the true first-submission gem rate. Full grade-by-grade breakdown below.
Grade-by-grade ROI & risk-adjusted outcomesNet vs raw per target grade, plus the probability-weighted distribution
| Target grade | Est. value | Grading fee | Net vs raw | Multiple |
|---|---|---|---|---|
| PSA 10 | $141.16 | $71 | +$58 | 12.1× |
| PSA 9 | $22.12 | $70 | −$60 | 1.9× |
| PSA 8 | $11.27 | $70 | −$70 | 1.0× |
⚖️ Risk-adjusted return
Best case isn't the whole story. Weighting every grade by how often it actually happens, across 120 PSA-graded copies:
| Likely outcome | Chance | Value |
|---|---|---|
| PSA 10 | 18.3% | $141.00 |
| PSA 9 | 36.7% | $22.00 |
| PSA ≤8 | 45% | $12.00 |
Net = graded value − raw value − grading cost (tier fee + ~$20 round-trip shipping), using PSA fees as of 2026-06-28; the paused PSA Value tier is excluded so this isn't overstated. Gem rate is estimated from cumulative PSA population, which skews toward nicer, resubmitted copies — so it overstates the true grade rate. Treat it as a guide, not a guarantee.
Population across gradersPSA, CGC & BGS — every grade, with gem rates
Only 18% of 120 PSA-graded Brock's Onix copies are a gem-mint 10 (22 of 120) — the rest grade lower.
Real graded population from PSA, CGC & BGS — a lower gem rate means a Brock's Onix 10 is harder to pull.
Copies for sale right now
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All grades & conditions
Every grade we pricePSA / CGC / BGS ladder with per-grade population
| Grade | Relative value | Price |
|---|---|---|
| PSA 10pop 22 | $141$120–$162 | |
| PSA 9pop 44 | $22$19–$25 | |
| PSA 8pop 33 | $11$10–$13 | |
| PSA 7pop 13 | $9$8–$10 |
Raw condition ladderNM → damaged, with real sold medians where we have them
For context: a graded PSA 5 slab of this card sells for about $9 (cert-verified) — a heavily-played raw copy shouldn't cost much more than that.
Price by printingBase vs reverse holo vs 1st edition — priced separately
Price by variant
TCGplayer market price per printing — reverse holo, 1st edition and unlimited often differ sharply.
Market dataCross-market spread, EU price, momentum & community buzz
Cross-market prices
35% spreadCurrently 35% cheaper on PriceCharting than TCGplayer. These are independent market prices for the same card — a wide gap can mean a buying opportunity. Informational only, not arbitrage advice.
Market signal
Derived from this card's 90-day price history, recent trend and cross-market price gap. Informational, not advice.
🇪🇺 Cardmarket price · Europe
25% cheaper than the USCard textAttacks, abilities, weakness / resistance / retreat
Flip a coin. If heads, the Defending Pokémon is now Paralyzed.
If your opponent has any Benched Pokémon, choose up to 2 of them. This attack does 20 damage to each of them. (Don't apply Weakness and Resistance for Benched Pokémon.) Brock's Onix can't attack during your next turn.
Card detailsSet, rarity, artist, Pokédex & specs
Other Brock's Onix cards
There are 2 different Brock's Onix printings — make sure you're valuing the right one. This is Gym Heroes #21 (Rare).
More from Gym Heroes
Frequently asked questions
How much is Brock's Onix (Gym Heroes #21) worth?
As of 20 August 2026, Brock's Onix from Gym Heroes is worth approximately $11.66 ungraded (near-mint), and around $141 in PSA 10 gem mint. Values are blended from real Cardmarket, eBay sold and TCGplayer prices and update daily.
What is the PSA 10 price for Brock's Onix?
A PSA 10 (gem mint) Brock's Onix from Gym Heroes is worth around $141 — roughly 12× the raw ungraded value of $11.66.
Should I grade my Brock's Onix?
A PSA 10 sells for about $141 versus $11.66 raw — roughly a 12× uplift. Grading is worth it when that premium comfortably beats the grading fee and the card is clean enough to have a real shot at a 10. See the "Should you grade it?" estimate above for net profit per grade.
Is Brock's Onix rare?
Brock's Onix is a Rare card from Gym Heroes (card #21), illustrated by Benimaru Itoh. Its current blended market value is $11.66 ungraded.
Cite & embed this card
Free to use with attribution to CardTrack.
Brock's Onix (Gym Heroes #21) — Pokémon market value $11.66, PSA 10 $141.16. Source: CardTrack, https://cardtrack.com/pokemon/card/gym-heroes/brock-s-onix-21<iframe src="https://cardtrack.com/embed/card?id=gym1-21" width="100%" height="160" style="border:0;max-width:460px" title="Brock's Onix price — CardTrack" loading="lazy"></iframe>
<p style="font:12px system-ui">Source: <a href="https://cardtrack.com">CardTrack</a></p>