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Brock's Onix 21

Brock's Onix 21

Gym Heroes · Rare · #21

£6.61
+3.3%1D
+5.3%7D
+4.3%30D
Find this on eBay UK

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Prices by grade

PSA 10 = 23.3× raw

Today's figures for every tier. Graded history starts building tonight.

Raw · ungraded£6.61
Grade 9£16.34
Grade 9.5£17.74
PSA 10£154
BGS 10£200
CGC 10£9.24

A PSA 10 sells for 23.3× the raw card — a gap of £148. Grading fees and the risk of a 9 come out of that.

At a glance

30-day high£6.61
30-day low£5.74
Tracked high£6.69
Days tracked138
IllustratorBenimaru Itoh
Pokédex95

Price history

116 readings · 138d
HoloHawk Est. MarketPriceChartingPulseTCG
24 Aug24 Aug26 Aug31 Aug
HoloHawk Est. MarketPriceChartingPulseTCG
31 Jul3 Aug17 Aug30 Aug
HoloHawk Est. MarketPriceChartingPulseTCG
14 Apr25 May5 Jul30 Aug
HoloHawk Est. Market · PriceCharting · PulseTCG. Hover any point for that day's figures. Flat sections mean the price did not move — a reading is recorded only when it changes.

Graded price history

PSA 10 · £154
PSA 10Grade 9.5Grade 9BGS 10CGC 10
14 Apr25 May5 Jul30 Aug
Graded prices from PriceCharting, in GBP. PSA 10 has been tracked since April 2026; the other tiers began recording 3 August 2026 and join the chart as their history builds.

New listings per day

1 today

How many new UK listings appear for this card each day. Rising supply against a falling price is the clearest sell signal there is. This counts what we saw, so it is a sample of the market rather than a total.

12 Aug18 Aug25 Aug31 Aug
New UK listings we saw appear each day. A direct count of what the scanner observed, not an estimate of everything on eBay. Source: HoloHawk, observed directly on eBay UK.

Confirmed sales per day

From tomorrow
How often this card actually sells We record roughly 4,600 UK auction outcomes a day across the catalogue. From tomorrow this charts how many close with a winning bid, day by day.

Only auctions that finished with a bid count. A listing vanishing is not proof of a sale, so it is not counted as one.

Recent confirmed sales

Recording live
No confirmed sales for this card yet We log every UK auction that closes with a winning bid — around 4,600 a day across the catalogue. The first result for this card appears here as soon as one sells.

On sale now in the UK

3 live

Fixed-price listings we are currently tracking, cheapest first. Asking prices, not sales, and a sample of what is listed rather than everything on eBay. Each row opens the listing on eBay — HoloHawk earns a commission on purchases made through it, and it never changes the price you pay.

ListingCondition Ask
Brock's Onix 21/132 Gym Heroes Rare Standard LP-Ungraded£8.00
Brock’s Onix 21/132 Gym Heroes Rare Pokemon Card WOTC 2000Ungraded£16.15
Pokémon TCG Brock's Onix Gym Heroes 21/132 Regular Rare LP.Ungraded£18.50
Where these numbers come from

Three independent readings, shown side by side rather than blended into one figure:

HoloHawk Est. Market Our own estimate, from live UK listings
PriceCharting Published reference price, USD converted to GBP
PulseTCG Published reference price, natively GBP

A reading is stored only when a price actually changes, so flat stretches mean the price held — not that data is missing. Where a source has no history for an item its line is absent rather than flat. Confirmed sales are UK auctions that closed with a winning bid, observed within three minutes of close, so each is a lower bound. Live listings are asking prices, not sales. Supply and sales counts are direct observations — listings we saw appear and auctions we saw close with a bid. We do not infer that a listing sold because it disappeared, so nothing here depends on that guess.

Also in Gym Heroes

Blaine's Moltres 1 £67.45
Misty's Tentacruel 10 £13.49
Erika 100 £4.60
Lt. Surge 101 £2.77
No Removal Gym 103 £6.64