Brock's Onix - Normal, Gym Heroes: Fair Value

tcgberg

Pichu HoloNEOPSA 9$4871.0%

Feraligatr HoloNEOPSA 9$3300.7%

Lugia HoloNEOPSA 9$2,7011.1%

Sabrina's Gengar HoloGYMPSA 8$7441.0%

Dark Charizard 1st EditionROKPSA 8$1,4430.1%

Charizard ex HoloMEWPSA 10$1,6471.0%

Erika's Clefable 1st EditionGYMPSA 10$3,2130.7%

Togetic HoloNEOPSA 7$440.0%

Heracross HoloNEOPSA 9$1130.0%

Steelix HoloNEOPSA 10$4320.0%

Charmeleon HoloMEWPSA 10$5250.0%

Wartortle HoloMEWPSA 10$4140.4%

Dark Weezing 1st EditionROKPSA 10$9510.0%

Meganium HoloNEOPSA 9$2230.0%

Machamp 1st Edition ShadowlessBASPSA 8$1213.3%

Alakazam ex HoloMEWPSA 10$3642.6%

Raichu UnlimitedBASPSA 9$3443.2%

Slowking HoloNEOPSA 7$966.3%

Dark Hypno 1st EditionROKPSA 9$2230.1%

Clefairy UnlimitedBASPSA 9$2382.6%

Nidoking UnlimitedBASPSA 7$541.3%

Venusaur UnlimitedBASPSA 7$2001.2%

Charizard UnlimitedBASPSA 9$3,3700.2%

Kingdra HoloNEOPSA 7$355.7%

Machoke HoloMEWPSA 9$380.2%

Gyarados UnlimitedBASPSA 6$460.9%

Moltres UnlimitedFOSPSA 10$35511.0%

Ivysaur UnlimitedBASPSA 8$462.3%

Snorlax HoloJUNPSA 8$2911.9%

Mewtwo UnlimitedBASPSA 8$1680.5%

Gengar HoloMEWPSA 10$2550.1%

Kangaskhan HoloJUNPSA 9$941.9%

Blastoise ex HoloMEWPSA 9$1655.5%

Mew ex HoloMEWPSA 9$610.8%

Jolteon HoloJUNPSA 8$12411.9%

Gust of Wind UnlimitedBASPSA 9$380.2%

Slowpoke 1st EditionFOSPSA 9$473.2%

Aerodactyl HoloFOSPSA 9$14410.1%

Electabuzz UnlimitedBASPSA 8$320.0%

Psyduck HoloMEWPSA 8$604.6%

Bulbasaur UnlimitedBASPSA 9$530.9%

Dratini Reverse HoloLGCPSA 6$18077.0%

Giovanni's Machamp 1st EditionGYCPSA 10$1,973233.4%

Dark Slowbro HoloROKPSA 10$992220.3%

Muk Reverse HoloLGCPSA 10$1,223219.2%

Dark Porygon2 1st EditionNDEPSA 10$5,124187.1%

Koga's Ditto 1st EditionGYCPSA 9$35482.0%

Nidoking Reverse HoloLGCPSA 9$1,02978.6%

Venusaur Reverse HoloLGCPSA 8$1,73768.9%

Zapdos 1st Edition ShadowlessBASPSA 10$9,22968.0%

Brock's Onix - Normal, Gym Heroes: Fair Value | TCGBerg

All grades matrix

Every grade we track for this printing. Click any column header to sort; the rightmost column jumps you to listings for that grade.

PSA10$51
1d 0.0%7d 0.0%30d 0.0%
Pop
22
Mcap
$1.1K
Conf
29
Last
$405
PSA9$17
1d 0.0%7d 0.0%30d 0.0%
Pop
44
Mcap
$726
Conf
35
Last
$18
PSA8$11
1d 0.0%7d 0.0%30d 0.0%
Pop
33
Mcap
$362
Conf
39
Last
$11


PSA10	$51	22	$1.1K	0.0%	0.0%	0.0%	0.0%	—	29	$4053mo ago
PSA9	$17	44	$726	0.0%	0.0%	0.0%	0.4%	—	35	$1811mo ago
PSA8	$11	33	$362	0.0%	0.0%	0.0%	6.6%	—	39	$112mo ago
PSA7	$18	13	$234	0.0%	0.0%	0.0%	0.0%	—	45	$183mo ago
PSA6	$11	2	$23	0.0%	0.0%	0.0%	0.0%	—	19	$114y ago
Raw	$6	—	—	—	—	—	—	—	—	—

Recent sales

Most recent transactions. From public auction comps and dealer reporting. Showing 3 of 3; delta vs fair value is the difference between the sale price and the grade's quoted fair value on that date.

Date	Grade	Price	Source	vs TCGBerg FV
Mar 21, 2026	PSA7	$18	ebay	0.1%
Aug 3, 2025	PSA7	$13	ebay	28.6%
Aug 1, 2025	PSA7	$18	ebay	1.3%

Mar 21, 2026PSA7
$180.1%
via ebay
Aug 3, 2025PSA7
$1328.6%
via ebay
Aug 1, 2025PSA7
$181.3%
via ebay

Analysis

Brock's Onix - Normal at PSA 10 carries a TCGBerg fair value of $51 as of 2026-06-21. We track a TCGBerg fair value across 5 grades from Gym Heroes, from PSA 8 up to PSA 10. A graded population of 22 copies sits behind the PSA 10 grade. The PSA 10 valuation carries low confidence (a confidence score of 29). Over the past 30 days, the PSA 10 TCGBerg fair value has risen 0.0%.

Show more analysis

PSA 10 commentary

The TCGBerg fair value of a PSA 10 Brock's Onix - Normal is $51 as of 2026-06-21. 22 copies have been graded at this level. This valuation carries low confidence (a confidence score of 29). Over the past 30 days the TCGBerg fair value has risen 0.0%.

PSA 10 — frequently asked

What is the TCGBerg fair value of a PSA 10 Brock's Onix - Normal?

$51 as of 2026-06-21, our model-derived fair value for a PSA 10 Brock's Onix - Normal based on recent graded sales.

How rare is a PSA 10 Brock's Onix - Normal?

22 copies have been graded at PSA 10, the graded population behind this atom.

How has the PSA 10 Brock's Onix - Normal price moved recently?

Its TCGBerg fair value has risen 0.0% over the past 30 days.

PSA 9 commentary

The TCGBerg fair value of a PSA 9 Brock's Onix - Normal is $16 as of 2026-06-21. 44 copies have been graded at this level. This valuation carries low confidence (a confidence score of 35). Over the past 90 days the TCGBerg fair value has risen 0.4%. The most recent recorded sale was $18 on 2025-07-25.

PSA 9 — frequently asked

What is the TCGBerg fair value of a PSA 9 Brock's Onix - Normal?

$16 as of 2026-06-21, our model-derived fair value for a PSA 9 Brock's Onix - Normal based on recent graded sales.

How rare is a PSA 9 Brock's Onix - Normal?

44 copies have been graded at PSA 9, the graded population behind this atom.

How has the PSA 9 Brock's Onix - Normal price moved recently?

Its TCGBerg fair value has risen 0.4% over the past 90 days.

PSA 8 commentary

The TCGBerg fair value of a PSA 8 Brock's Onix - Normal is $11 as of 2026-06-21. 33 copies have been graded at this level. This valuation carries low confidence (a confidence score of 39). Over the past 90 days the TCGBerg fair value has fallen 6.6%. The most recent recorded sale was $10 on 2026-04-08.

PSA 8 — frequently asked

What is the TCGBerg fair value of a PSA 8 Brock's Onix - Normal?

$11 as of 2026-06-21, our model-derived fair value for a PSA 8 Brock's Onix - Normal based on recent graded sales.

How rare is a PSA 8 Brock's Onix - Normal?

33 copies have been graded at PSA 8, the graded population behind this atom.

How has the PSA 8 Brock's Onix - Normal price moved recently?

Its TCGBerg fair value has fallen 6.6% over the past 90 days.

PSA 7 commentary

The TCGBerg fair value of a PSA 7 Brock's Onix - Normal is $18 as of 2026-06-21. 13 copies have been graded at this level. This valuation carries medium confidence (a confidence score of 45). The most recent recorded sale was $18 on 2026-03-21.

PSA 7 — frequently asked

What is the TCGBerg fair value of a PSA 7 Brock's Onix - Normal?

$18 as of 2026-06-21, our model-derived fair value for a PSA 7 Brock's Onix - Normal based on recent graded sales.

How rare is a PSA 7 Brock's Onix - Normal?

13 copies have been graded at PSA 7, the graded population behind this atom.

PSA 6 commentary

The TCGBerg fair value of a PSA 6 Brock's Onix - Normal is $11 as of 2026-06-21. 2 copies have been graded at this level. This valuation carries very low confidence (a confidence score of 19). The most recent recorded sale was $11 on 2022-12-14.

PSA 6 — frequently asked

What is the TCGBerg fair value of a PSA 6 Brock's Onix - Normal?

$11 as of 2026-06-21, our model-derived fair value for a PSA 6 Brock's Onix - Normal based on recent graded sales.

How rare is a PSA 6 Brock's Onix - Normal?

2 copies have been graded at PSA 6, the graded population behind this atom.

Brock's Onix #21, Normal, Gym Heroes

Price history

Price spectrum

TCGBerg fair value by grade

All grades matrix

Active listings on eBay

About Gym Heroes

Recent sales

Population & rarity

Relative valuation vs. index

Analysis

PSA 10 commentary

PSA 10 — frequently asked

PSA 9 commentary

PSA 9 — frequently asked

PSA 8 commentary

PSA 8 — frequently asked

PSA 7 commentary

PSA 7 — frequently asked

PSA 6 commentary

PSA 6 — frequently asked

Other printings of Brock's Onix

Indices containing this card

Parent set

Brock's Onix #21, Normal, Gym Heroes

Price spectrum

TCGBerg fair value by gradeSide-by-side comparison of fair value across every grade we track for this printing. The bar chart uses a log scale so raw and gem-mint fit on one axis.

All grades matrix

Active listings on eBayLive asking prices from eBay sellers. The delta shows how each ask compares to TCGBerg's quoted fair value for that grade. Verified deals are marked from the published analytics feed.

About Gym Heroes

Recent sales

Population & rarityHow Brock's Onix's graded copies are spread across grades. Each bar is the number of copies graded at that grade; the percentage is that grade's share of the total graded population. Fewer copies at a grade = scarcer = a scarcity premium.

Relative valuation vs. indexBoth series are indexed to 100 at May 10, 2026, the index’s inception date, not the start of the selected range. A divergence means the card has outperformed or underperformed the index since then, by exactly the percentage-point gap.

Analysis

PSA 10 commentary

PSA 10 — frequently asked

PSA 9 commentary

PSA 9 — frequently asked

PSA 8 commentary

PSA 8 — frequently asked

PSA 7 commentary

PSA 7 — frequently asked

PSA 6 commentary

PSA 6 — frequently asked

Related

Other printings of Brock's Onix

Indices containing this card

Parent set

TCGBerg fair value by grade

Active listings on eBay

Population & rarity

Relative valuation vs. index