How much is a PSA 10 Brock's Onix [1st Edition] #21?

A PSA 10 Brock's Onix [1st Edition] #21 from Pokemon Gym Heroes is currently priced at $405 based on completed sales tracked on PokeInvest.

Is grading Brock's Onix [1st Edition] #21 worth it?

With a raw price of $15 and a PSA 10 selling for $405, grading Brock's Onix [1st Edition] #21 has a potential gross margin of $390 before PSA fees ($15-50 depending on service tier). Use the PokeInvest PSA Calculator for a full ROI breakdown.

PSA 9 vs PSA 10 Brock's Onix [1st Edition] #21: what's the price difference?

A PSA 10 Brock's Onix [1st Edition] #21 sells for about $405 versus about $65 for a graded 9 (PSA, CGC and BGS 9 sales combined), so the 10 carries a 6.2x premium based on recent sales tracked on PokeInvest.

What's the raw price of Brock's Onix [1st Edition] #21?

The raw (ungraded) price of Brock's Onix [1st Edition] #21 from Pokemon Gym Heroes is currently $17, based on live market data tracked daily by PokeInvest.

Brock's Onix [1st Edition] #21

Pokemon Gym Heroes

Ungraded

$15.50

17 sales

Sales we held out are listed below, not counted here.

17 sold in 56 days · latest 2 weeks ago

$8.50 $26.03

$17.74 2 weeks ago Brock's Onix (21) · Near Mint · 1st Edition · English $10.75 2 weeks ago Brock's Onix (21) · Lightly Played · 1st Edition · English $24.69 2 weeks ago Pokemon Gym Heroes "Brock's Onix" 21/132 / 1st Edition / Lightly Played 21/132 $10.74 2 weeks ago Brock's Onix (21) · Lightly Played · 1st Edition · English $15.00 2 weeks ago 1st Edition Brock's Onix | 21/132 | Gym Heroes | Regular | MP | WOTC Pokemon 21/132 $24.95 5 weeks ago BROCK’S ONIX - 1st Edition Gym Heroes - 21/132 - Rare - Pokemon - NM $19.99 5 weeks ago Brock's Onix 21/132 Gym Heroes 1st Edition Pokemon Rare Non-Holo LV 30 NM 21/132 $15.50 5 weeks ago Pokemon 1st Ed. Gym Heroes Rare Brock's Onix 21/132 - Lightly Played (LP) 21/132 $12.99 6 weeks ago 1x Brock's Onix from Gym Heroes 1st Edition LP Pokemon TCG 021/132 $18.70 6 weeks ago Brock's Onix 21/132 Gym Heroes 1st Edition Non-Holo Rare Pokemon Card NM 21/132 $12.99 6 weeks ago Brock's Onix 21/132 Gym Heroes Pokemon TCG 1st Edition Lightly Played $20.00 6 weeks ago Brock's Onix 1st Edition Gym Heroes Non-Holo Rare No. 21/132 Pokemon - 2000 #21 $8.50 7 weeks ago 1st Edition Brock's Onix | 21/132 | Gym Heroes | Regular | LP | WOTC Pokemon 21/132 $13.99 8 weeks ago Pokemon Brock's Onix 21/132 / 1st edition / Gym Heroes / rare / 21/132 $13.51 8 weeks ago Pokemon Card - Brock's Onix Gym Heroes 21/132 1st Edition Rare 21/132 $26.03 2 months ago Brock's Onix - 21/132 - Pokemon Gym Heroes 1st Edition Rare Card WOTC NM $18.99 2 months ago Brock's Onix 21/132 Rare Gym Heroes Pokemon 1st Edition NM/LP 21/132

Also held for this card: 1 CGC 9.5, 1 PSA 10, 3 PSA 8, 1 PSA 9. Priced separately, never mixed into this median.

Every sale is a completed listing. Click any line to open it.

Price by grade

4 from real sales

Grade	PSA	CGC	BGS	SGC
10			—	—
9.5	—		—	—
9
8.5	—		—	—
8		—	—	—
7		—	—	—

Medians of completed sales — click one to see them. Arrows compare the last 90 days with the period before. last sold means one or two sales, so we show the most recent one rather than a median. est is an estimate we have not confirmed. pop is how many exist at that grade. How we price

Grade it? 17% of 307 PSA-graded copies came back a 10. Raw $15.25 → PSA 10 $405.00. Expected value after a $25 fee: +$83.45 per copy.

Run the full math →

Sales volume: Top 40% of cards