Graded economics-22%
PSA 10$70.00PriceCharting crawler
PSA 9$16.65PriceCharting crawler
PSA 8-PriceCharting crawler
Net EV$-7.84$27.80 net sale vs $35.64 cost
Outcome mix10 30% / 9 70%
Assumption$25.00 grade, 15% sale haircut
PSA 10/9 premium4.2x
PopulationPSA 10
Gem rate30.1%
PSA 10 pop205
Total pop681
SourceGemRate snapshot enrichment
PSA 10 velocity-
Total velocity-
SnapshotJun 20, 2026
Scarcity50/100
LabelWeak
Confidence100/100
Supply49/100
Demand11/100
Gem rate 30.1%PSA 10 pop 205/681PSA 10/9 premium 4.2xSupply constraint 49/100
Raw validationconfirmed
TCG market$10.56
Pulse price$10.64
Delta-1%
CheckedJun 21, 2026
Gravity Mountain - 250/191PSA comps refreshed Jun 22, 2026
Signal context1
Drawdown51% off peak, Falling
*All-time high/low are within the tracked window (2024-11-08 - 2026-09-15). Raw, ungraded TCGplayer market price (blue) and cheapest listing (grey) via the free TCGCSV mirror. Personal, non-commercial prototype - not investment advice.