Question 1

How is the Brock's Onix #21/132 (1st Edition) Gym Heroes price determined?

Accepted Answer

Every price you see in PokeValue comes from live listings on CardMarket — the largest trading-card marketplace in Europe. For Brock's Onix #21/132 we pull all the currently active listings and break them down by condition, so you get a separate price for each of the seven grades: Poor, Played, Light Played, Good, Excellent, Near Mint and Mint. Listings are filtered to English copies only and to the exact variant — regular cards never include reverse-holo or 1st-edition listings, and vice versa. Prices refresh regularly, so the values you see reflect the current European market.

Question 2

What is Brock's Onix #21/132 (1st Edition) Gym Heroes worth right now?

Accepted Answer

The PokeValue market price for Brock's Onix #21/132 from Gym Heroes is around €14.80 in Good condition. The trend price is €9.91. The value moves with condition — a Near Mint copy is worth significantly more than a Played or Poor one. See the per-condition price breakdown above for exact figures.

Question 3

Why does the price of Brock's Onix #21/132 Gym Heroes vary so much by condition?

Accepted Answer

Condition is the single biggest driver of value on a Pokémon card. Edge whitening, surface scratches, bends and centering issues each step the price down. A Near Mint Brock's Onix Gym Heroes can be worth 2–3× a Good copy, and a graded PSA 10 can be worth several times an ungraded Near Mint. PokeValue prices each condition separately so you know exactly what your copy is worth.

Question 4

Where can I buy Brock's Onix #21/132 Gym Heroes?

Accepted Answer

Most Brock's Onix #21/132 Gym Heroes listings live on CardMarket, where European sellers post copies by condition and variant. You can also find occasional copies on Tradera, eBay and dedicated card shops. Use PokeValue to check the current market price before you buy so you don't overpay.

Question 5

Is Brock's Onix #21/132 Gym Heroes rare?

Accepted Answer

Brock's Onix #21/132 from Gym Heroes is highly liquid and sells frequently. At the moment there are around 76 active listings on CardMarket. Over the last 30 days the card has sold on 15 different days. Rarity is driven by set size, how long ago the set was released and the popularity of the Pokémon depicted.

Brock's Onix #21 Pokemon Gym Heroes

Brock's Onix 21/132 price – sold and for sale

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Market price overview for Brock's Onix #21 from Gym Heroes

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Other printings of Brock's Onix