Koffing #50
Pokemon Evolutions · #50 · Base · Nov 2016
Maybe — Proceed with Caution
Should You Grade?
Raw Price
$0.41
Expected Value
$-2.28
Net Profit
$1.63
Gem Rate
12.1%
ROI
+11%
Sales / Yr
87
Negative expected value ($-2.28) — while a PSA 10 would be profitable, the probability-weighted outcome across all grades means you lose money on average at this grading tier. The gem rate is only 12% — you'll need a very clean copy to hit PSA 10. Only 87 sales per year — it may take time to find a buyer at full price. PSA 10 profit of $1.63 is thin — grading fees and selling costs eat most of the margin.
ⓘPopulation data match confidence: 52% — verify on PSA
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
$0.41
BGS 10
$65.00
PSA 10
$50.00
SGC 10
$30.00
CGC 10
$17.04
BGS 9.5
$17.00
9
$14.00
8
$12.45
7
$7.51
12.1%Gem Rate (PSA 10)
+7 graded in 30 days
+18 in 90 days
Grade Distribution (321 total graded)
321Total
PSA 103912.1%
PSA 916852.3%
PSA 88526.5%
PSA 7185.6%
Below 792.8%