![Earthen Seal Stone [Reverse Holo] #154](https://storage.googleapis.com/images.pricecharting.com/9cc4929454ecb7218adf3ec5e25e9e056fa60cafc9aa8c0148eb2b8f4c6d020d/1600.jpg)
Pokemon Silver Tempest · #154 · Base · Nov 2022
Should You Grade?
Negative expected value ($-3.46) — 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 39 graded cards may be unreliable, and the market for this card in graded form may be illiquid. The gem rate is only 26% — you'll need a very clean copy to hit PSA 10. Only 9 sales per year — it may take time to find a buyer at full price. PSA 10 profit of $11.01 is thin — grading fees and selling costs eat most of the margin.
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.
