![Porygon [Holo] #137](https://storage.googleapis.com/images.pricecharting.com/7aa0cb3038d49b691469fb7ffc8b93009f453a1bd74940efd9e7b1b473f7b5b7/1600.jpg)
Porygon [Holo] #137
Pokemon Japanese CD Promo · #137 · Jun 1999
Maybe — Proceed with Caution
Should You Grade?
Raw Price
$27.49
Expected Value
$55.30
Net Profit
$67.51
Gem Rate
19.9%
ROI
+159%
Sales / Yr
593
The gem rate is only 20% — you'll need a very clean copy to hit PSA 10.
Best Tier for Flipping
Factors in grading cost, turnaround time, and compounding — how fast you can reinvest profits into the next flip.
Profitability by Grading Company
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
$27.49
BGS 10
$931.00
PSA 10
$716.11
SGC 10
$430.00
9
$113.99
CGC 10
$110.00
8
$57.93
7
$26.00
19.9%Gem Rate (PSA 10)
+78 graded in 30 days
+175 in 90 days
Grade Distribution (10,139 total graded)
10,139Total
PSA 102,02219.9%
PSA 95,75156.7%
PSA 81,60415.8%
PSA 72092.1%
Below 75375.3%