Brock's Onix [1st Edition] #21
Pokémon card · Gym era · Released Aug 2000
Market value
$405▲ 364% in a year
Estimated from recent completed sales.
$405 · Oct 2026
Brock's Onix [1st Edition] #21 for saleRefreshing eBay listings
Advertisement
Checking eBay…
As an eBay Partner Network affiliate, we earn from qualifying purchases. Affiliate disclosure.
Other Onix cards
About this card
Card guide
Brock's Onix [1st Edition] #21 — price research
Brock's Onix [1st Edition] #21 is a Pokémon card from Gym Heroes (2000). Today it's worth about $405 in PSA 10 and $17.49 ungraded, up 364% in a year. Compare grades, see the price chart and browse cards for sale on eBay.
Prices on eBay can differ from these values depending on condition, grading company and seller. They're a guide to what the card is worth, not investment advice.
Liquidity
moderateModerate liquidity
91 sales/year · estimated tier from yearly volume · ~8 all grades
~7.6
sales/month
Trades fairly often
~7.6 sales/monthScale
Very high
High
Moderate
Low
Illiquid
| Grade | History | Price | 3mo | 6mo | 12mo | Δ12mo | PSA Pop | PSA Pop % | Liquidity |
|---|---|---|---|---|---|---|---|---|---|
| PSA 10 | $405Shop on eBay | $405 | $285 | $87.27 | +364% | — | — | moderate | |
| PSA 9 | $79.50Shop on eBay | $59.88 | $60.57 | $41.99 | +89% | — | — | moderate | |
| PSA 8 | $29.81Shop on eBay | $26.35 | $17.99 | $12.75 | +134% | — | — | moderate | |
| PSA 7 | $27.87Shop on eBay | $23.95 | $14 | $10 | +179% | — | — | moderate | |
| Ungraded | $17.49Shop on eBay | $16.11 | $14.99 | $10.72 | +63% | — | — | moderate | |
Card details
- Set
- Gym Heroes
- Rarity
- Rare
- Release date
- 14 Aug 2000
- TCGplayer ID
- 83974
- PriceCharting ID
- 2156453
More from Gym Heroes
Sabrina's Gengar #14Gym Heroes![Misty's Seadra [Pre-Release] #9](https://cdn.pokegoto.com/storage/v1/object/public/catalog-card-art/pokemon-gym-heroes/misty's-seadra-pre-release-9/240.webp)
Misty's Seadra [Pre-Release] #9Gym Heroes![Sabrina's Gengar [1st Edition] #14](https://cdn.pokegoto.com/storage/v1/object/public/catalog-card-art/pokemon-gym-heroes/sabrina's-gengar-1st-edition-14/240.webp)
Sabrina's Gengar [1st Edition] #14Gym Heroes![Blaine's Moltres [1st Edition] #1](https://cdn.pokegoto.com/storage/v1/object/public/catalog-card-art/pokemon-gym-heroes/blaine's-moltres-1st-edition-1/240.webp)
Blaine's Moltres [1st Edition] #1Gym Heroes
Erika's Vileplume #5Gym Heroes
Brock's Rhydon #2Gym Heroes![Lt. Surge's Pikachu [1st Edition] #81](https://cdn.pokegoto.com/storage/v1/object/public/catalog-card-art/pokemon-gym-heroes/lt-surge's-pikachu-1st-edition-81/240.webp)
Lt. Surge's Pikachu [1st Edition] #81Gym Heroes
Blaine's Moltres #1Gym Heroes
Erika's Dragonair #4Gym Heroes
Rocket's Scyther #13Gym Heroes
Rocket's Hitmonchan #11Gym Heroes
Rocket's Moltres #12Gym Heroes