![Koga [1st Edition] #19](https://storage.googleapis.com/images.pricecharting.com/c3c4fb102441bcc09329d38b1d28a98bba538ccd5da9e99842edcec01827ee44/1600.jpg)
Pokemon Gym Challenge · #19 · Oct 2000
The gem rate is only 14% — you'll need a very clean copy to hit PSA 10.
ⓘPopulation data match confidence: 62% — verify on PSA
TAG Basic$22.00/card · 30+ business days
Net Profit $42.50
Per-Flip ROI 127%
Annualized 2,340%
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% |
Shows the best-value tier from each grading company based on EV, cost, and turnaround. Pop = total graded population; 10s = grade 10 count.
14.1%Gem Rate (PSA 10)
+6 graded in 30 days
+15 in 90 days
Grade Distribution (1,375 total graded)
Active
42
30-day avg listings
Liquidity
62%
sold ÷ listed
Active
11
30-day avg listings
Liquidity
48%
sold ÷ listed
