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Brock's Onix #21, Unlimited, Gym Heroes

  • Card number: #21/132
  • Rarity: Holo Rare
  • Finish: Holo

A PSA 10 Brock's Onix #21 Unlimited from Gym Heroes has a TCGBerg fair value of $270 as of Nov 15, 2026. It rests on 12 recorded sales, the latest on Sep 26, 2026. PSA has graded 22 copies at PSA 10. Sales evidence is limited, so treat this value as a rough estimate.

TCGBerg fair valuePSA 10
As of Nov 15, 2026
$270down 1.1%30-day change

TCGBerg Algorithm (estimated from recorded sales).

12 sales · latest Sep 26, 2026

Fair value3 months
Last sale$238Sep 26, 202611.8% below fair
5-sale avg$245Jan 8Sep 26
Population · PSA 10
22
Market cap
$5.9K
Volatility
0.8%
YTD
↑ 173.5%
Sales evidence
Limited

TCGBerg fair value · PSA 10

$270

30D1.1%YTD173.5%
Sales evidenceLimited

Based on 12 recorded sales. Latest sale: Sep 26, 2026.

Market cap
$5.9K
fair value x population
Population
22
graded copies
Last sale
$238
-11.8% vs fair
5-sale avg
$245
recent sales
GradingSell

Price history

Open terminalPro

Weekly fair value for PSA 10.

Open in TerminalCandles, every grade, full historyPro

What the evidence says

The last PSA 10 sale, $238 on Sep 26, 2026, sits 11.8% below the $270 fair value. The value rests on 12 recorded PSA 10 sales. Its confidence band runs from $203 to $338. A PSA 10 ($270) is worth 5.3 times a PSA 9 ($51). Over the past 30 days the PSA 10 value has fallen 1.1%. With limited sales evidence, read the gap and the band as rough guides.

TCGBerg fair value by grade

Value at each grade and ungraded condition. Log scale. Tap a row to switch the whole page.

  • Raw NM$9.76Ungraded · TCGBerg fair value
  • Raw LP$7.82Ungraded · TCGBerg fair value
  • Raw MP$5.80Ungraded · TCGBerg fair value
  • Raw HP$4.63Ungraded · TCGBerg fair value
  • Raw Damaged$4.09Ungraded · TCGBerg fair value

Behind the scenes

What goes into this price, and how much we know.

Recent sales

20 tracked

Each sale against the grade's fair value on the day it sold.

  • $9.48
    Nov 5, 2026 · via tcgplayer
    Rawabove fair value by 7.2%
  • $9.35
    Oct 31, 2026 · via tcgplayer
    Rawabove fair value by 1.1%
  • $11
    Oct 28, 2026 · via tcgplayer
    Rawabove fair value by 18.9%
  • $15
    Oct 27, 2026 · via tcgplayer
    Rawabove fair value by 58.1%
  • $8.00
    Oct 27, 2026 · via tcgplayer
    Rawbelow fair value by 13.5%

15 more sales with Pro

Up to 20 recent sales, each with its venue and its gap to fair value.

Includes a sale 33.1% below fair value

All grades matrix

Every grade we track for this printing.

  • CGC Pristine 10$101
    1d 0.0%7d 0.0%30d 0.0%
    Pop
    -
    Mcap
    -
    Evidence
    Sparse
    Last
    $101
  • BGS9.5$11
    1d 0.0%7d 0.0%30d 0.0%
    Pop
    1
    Mcap
    $11
    Evidence
    Sparse
    Last
    -
  • PSA10$270
    1d 0.2%7d 0.3%30d 1.1%
    Pop
    22
    Mcap
    $5.9K
    Evidence
    Limited
    Last
    $238
Listings
CGC Pristine 10$101--0.0%0.0%0.0%Sparse$10110mo ago
BGS9.5$111$110.0%0.0%0.0%Sparse-
PSA10$27022$5.9Kup 0.3%down 1.1%down 12.3%Limited$2382mo ago
PSA9$5145$2.3Kup 0.1%down 0.4%up 32.1%Sparse$181y ago
PSA8$2634$873up 0.2%up 0.6%up 15.4%Limited$243mo ago
PSA7$2614$358up 0.1%up 2.2%up 15.1%Limited$188mo ago
PSA6$134$520.0%up 13.6%down 38.9%Sparse$8.001mo ago
PSA5$137-0.0%up 13.6%down 38.9%Sparse-
Raw$9.76--up 10.4%up 6.4%-Very strong$9.481w ago

Graded population report

129 graded copies of Brock's Onix Unlimited across 9 grades.

PSA 10
22 · 17%
PSA 9
45 · 35%
PSA 8
34 · 26%
PSA 7
14 · 11%
PSA 6
4 · 3.1%
BGS 9.5
1 · 0.8%
BGS 9
1 · 0.8%
BGS 8
1 · 0.8%
PSA 5
7 · 5.4%

PSA 10 makes up 17% of graded copies: 22 of 129. PSA 9 is the most common grade (35%).

Analysis

Brock's Onix - Unlimited at PSA 10 carries a TCGBerg fair value of $270 as of 2026-11-14. We track a TCGBerg fair value across 8 grades from Gym Heroes, from BGS 9.5 up to PSA 10. A graded population of 22 copies sits behind the PSA 10 grade. The PSA 10 valuation rests on limited sales evidence. Over the past 30 days, the PSA 10 TCGBerg fair value has fallen 1.1%.

PSA 10 - frequently asked

How much is a PSA 10 Brock's Onix - Unlimited from Gym Heroes worth?
$270 as of 2026-11-14, the model-derived TCGBerg fair value for a PSA 10 Brock's Onix - Unlimited from Gym Heroes. It rests on limited sales evidence. This estimate is not a guaranteed sale price.
What is the graded population of a PSA 10 Brock's Onix - Unlimited from Gym Heroes?
22 copies have been graded at PSA 10, the recorded graded population, not the number of copies printed.
How has the PSA 10 Brock's Onix - Unlimited from Gym Heroes price moved recently?
Its TCGBerg fair value has fallen 1.1% over the past 30 days.
What did a PSA 10 Brock's Onix - Unlimited from Gym Heroes last sell for?
The most recent recorded sale was $238 on 2026-09-26. This recorded sale is separate from the model-derived fair value.