Brock's Onix [1st Edition] #21

Pokemon Gym Heroes · #21 · Aug 2000

Buy Raw on eBayPSA 10 Sold on eBay

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Maybe — Proceed with Caution

Should You Grade?

Raw Price

$14.90

Expected Value

$14.53

Net Profit

$31.10

Gem Rate

18.3%

ROI

+104%

Sales / Yr

103

The gem rate is only 18% — you'll need a very clean copy to hit PSA 10.

Best Tier for Flipping

Unlock with Pro →

Factors in grading cost, turnaround time, and compounding — how fast you can reinvest profits into the next flip.

Profitability by Grading Company

Company	Best Tier	Gem Rate	Pop	10s	Cost	EV	Net Profit	ROI
PSA	PSA Standard	52.3%	8,420	1,250	$20.00	$85.40	$32.50	127%
BGS	BGS Standard	52.3%	8,420	1,250	$20.00	$85.40	$32.50	127%
CGC	CGC Standard	52.3%	8,420	1,250	$20.00	$85.40	$32.50	127%
SGC	SGC Standard	52.3%	8,420	1,250	$20.00	$85.40	$32.50	127%
TAG	TAG Standard	52.3%	8,420	1,250	$20.00	$85.40	$32.50	127%

Compare All Companies with Pro →

Shows the best-value tier from each grading company based on EV, cost, and turnaround. Pop = total graded population; 10s = grade 10 count.

Price by Grade

Raw

$14.90

BGS 10

$114.00

PSA 10

$87.44

CGC 10

$61.00

$57.50

SGC 10

$52.00

BGS 9.5

$47.00

$17.94

$14.00

View Sold PSA 10 Prices on PriceCharting →View Grading Data on GemRate →

18.3%Gem Rate (PSA 10)

+1 graded in 30 days

+1 in 90 days

Grade Distribution (290 total graded)

290Total

PSA 105318.3%

PSA 913947.9%

PSA 87124.5%

PSA 7196.6%

Below 782.8%