![Brock's Vulpix [W Stamp] #37](https://storage.googleapis.com/images.pricecharting.com/df4fdee5dcb20d288b9869c98b4918b64ddad0ed1dfbc39905bbd57c7418bee1/1600.jpg)
Pokemon Gym Challenge · #37 · Base · Mar 2001
Should You Grade?
Negative expected value ($-3.97) — while a PSA 10 would be profitable, the probability-weighted outcome across all grades means you lose money on average at this grading tier. Low grading population — gem rates based on only 91 graded cards may be unreliable, and the market for this card in graded form may be illiquid. The gem rate is only 18% — you'll need a very clean copy to hit PSA 10.
Factors in grading cost, turnaround time, and compounding — how fast you can reinvest profits into the next flip.
Shows the best-value tier from each grading company based on EV, cost, and turnaround. Pop = total graded population; 10s = grade 10 count.
