Identity checkMatches
✓CardSkyridge #H21/H32 · Holo
✓Tracker matchNidoqueen (H21) · Skyridge · #H21/H32
✓Raw pricePulse $212.49 vs tracker $208.33 (-2%)
✓Gem rate23.2% · GemRate snapshot enrichment · this printing
✓PSA 10 comp$2,570 · PriceCharting crawler · this printing
✓PSA 9 comp$472.94 · PriceCharting crawler · this printing
✓PSA 8 comp$335.00 · PriceCharting crawler · this printing
Your grading resultsNone logged
Your results on this set: none graded yet
Your results on Vintage: none graded yet
Vintage grade odds use the starting assumptions until 5 Vintage grades are back.
Graded economics+74%
PSA 10$2,570PriceCharting crawler
PSA 9$472.94PriceCharting crawler
PSA 8$335.00PriceCharting crawler
Net EV$249.23$584.20 net sale vs $334.97 cost
EV rangeEV range: +50% / +74% / +110% (pessimistic / expected / optimistic)Max buy $300.08 (pessimistic case returns 20%), with the card's value held at $212.49PSA 10 rate 21.2–25.3% (80% interval on 163 / 704); comps ±17.5% (comp quality 65). The 80% interval, the comp band and the ×0.5 / ×1.5 fallback without population counts are starting assumptions.
Outcome mix10 15% / 9 38% / 8 26% / ≤7 21%
PSA 10 ratePopulation 23.2% → adjusted 14.8% (Vintage, ×0.64 at $212 value, starting assumption)
Break-evenProfitable even with no PSA 10s
CostsRaw $212.49 + shipping $5.00 + grading $102.62 (expected; 15% chance of an upcharge tier) + submission shipping $6.00 + time cost $8.86 = $334.97Net sale after fees: PSA 10 $2,200.38 · PSA 9 $400.49 · PSA 8 $282.11 · ≤7 $158.73PSA tier: Standard $59.99; 15% chance of an upcharge to Super Express; about 116 days at PSA. PSA and eBay fees from their official pages; eBay fees include 7% sales tax in their base; that, the shipping and the 10%/yr time cost are your assumptions (Settings).
Grade splitVintage grade split (starting assumption); ≤7 valued at 90% of raw
PSA 10/9 premium5.4x
PopulationPSA 10
Gem rate23.2%
PSA 10 pop163
Total pop704
SourceGemRate snapshot enrichment
PSA 10 velocity-
Total velocity-
SnapshotJun 20, 2026
Scarcity69/100
LabelWatch
Confidence100/100
Supply59/100
Demand100/100
Gem rate 23.2%PSA 10 pop 163/704PSA 10/9 premium 5.4xSupply constraint 59/100
Raw validationconfirmed
TCG market$208.33
Pulse price$212.49
Delta-2%
CheckedJun 22, 2026
Nidoqueen (H21)PSA comps refreshed Jun 22, 2026
Signal context1
Support$200.00 floor, 2 tests
*All-time high/low are within the tracked window (2024-03-08 - 2026-10-14). Raw, ungraded TCGplayer market price (blue) and cheapest listing (grey) via the free TCGCSV mirror. Personal, non-commercial prototype - not investment advice.