Brock's Onix Gym Heroes Rare Holo Pokémon card — value and price

Photo is the set's stock scan and may show a different printing (e.g. a 1st Edition stamp) — this value is for the 1st Edition printing.

Brock's Onix

Gym Heroes · Rare Holo
Pokémon pkm:gym1-21 TCGPlayer + Cardmarket
Fair market value
$13.12
Consensus of 2 market price guides. Typical $7.22 – $19.74.
▲ 9% · 32d
Sources: TCGPlayer + Cardmarket · Near Mint, raw
Optimal buy
$11.33
Never pay above $12.31
Optimal sell
$14.16
Never sell below $13.43
Buy this card · aim to pay under $12.31
Find on eBay → TCGplayer → Buy on Amazon → Graded (PSA 10) →

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Selling this card
Optimal sell $14.16 · never below $13.43. Value your copy for the live net-after-fees calculator.
Where to sell
eBay~13.25% + $0.30Largest audience; on any listing use “Sell one like this” to prefill yours.TCGplayer~10–11%Best for singles; buyers expect competitive, data-driven pricing.Whatnot~8% + paymentLive-auction app; strong for breaks, lots, and fast sales.
Shipping & protection supplies
Low value — a sleeve in a plain/bubble mailer is plenty; tracking optional under ~$20.
Penny sleevesBubble mailers
Related cards
Brock's Onix cardBrock's OnixGym Heroes$35.93Lt. Surge's Pikachu cardLt. Surge's PikachuGym Heroes$20.90Blaine's Charmander cardBlaine's CharmanderGym Heroes$12.62Misty's Psyduck cardMisty's PsyduckGym Heroes$28.14Brock's Vulpix cardBrock's VulpixGym Heroes$6.96Sabrina's Slowpoke cardSabrina's SlowpokeGym Heroes$6.22
All Brock's Onix printings →More Gym Heroes →
Common questions
How much is Brock's Onix worth?

Brock's Onix from Gym Heroes has a fair market value of about $13.12 (Near Mint, raw), based on a consensus of current market price guides.

What is the best price to sell Brock's Onix?

List around $14.16 to clear without leaving money on the table; that nets about $10.92 after fees and shipping.

What should I pay to buy Brock's Onix?

A disciplined buy target is about $11.33 — a discount to fair value that keeps an edge. Aim not to pay above $12.31.

Where can I buy Brock's Onix?

Brock's Onix is sold on eBay, TCGplayer, and Amazon. Compare live listings against the fair value of $13.12 and aim to pay under $12.31 — SplitShot links you straight to current listings at each marketplace.

Is now a good time to buy Brock's Onix?

Brock's Onix is trending falling ~16% (7d vs 30d) lately. A disciplined entry is under $12.31; paying near or below $11.33 keeps a margin of safety versus the $13.12 fair value.

Estimate for guidance, not an appraisal. Value your exact copy →