Koffing [1st Edition] #51

Pokemon Base Set · #51 · Jun 1995

Buy Raw on eBayPSA 10 Sold on eBay

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Maybe — Proceed with Caution

Should You Grade?

Raw Price

$24.95

Expected Value

$24.67

Net Profit

$45.55

Gem Rate

23.0%

ROI

+114%

Sales / Yr

275

The gem rate is only 23% — you'll need a very clean copy to hit PSA 10.

Best Tier for Flipping

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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

$24.95

BGS 10

$760.00

PSA 10

$584.74

SGC 10

$351.00

CGC 10

$85.50

$74.28

BGS 9.5

$54.99

$50.00

$37.55

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

23.0%Gem Rate (PSA 10)

+32 graded in 30 days

+85 in 90 days

Grade Distribution (2,748 total graded)

2,748Total

PSA 1063223.0%

PSA 91,09439.8%

PSA 854819.9%

PSA 72438.8%

Below 72177.9%

eBay Market Signals

3–4 month horizon

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