Cornerstone Mask Ogerpon ex
Terastal Fest ex · #91/187 · Double Rare · 2024JPN
Price history
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Graded values
updated 2026-07-26Grades 1–6 are estimates modeled from the raw price — PSA/CGC/BGS 7–10 and Ungraded are live tracked market values.
PSA 10 chart is building — graded values are tracked nightly, a new point appears each day.
Graded population census · updated 2026-07-11
Population data from PriceCharting, updated monthly.
How much is Cornerstone Mask Ogerpon ex #91/187 worth?
Cornerstone Mask Ogerpon ex #91/187 is a Double Rare Japanese card from Terastal Fest ex (2024) — today it trades at roughly $0.29 ungraded.
Grading changes the math on this one: a PSA 10 is valued around $19.38, roughly 66.8x the raw price, while a PSA 9 sits near $10.81. 649 copies have been graded to date, and 80% of them came back a 10 — worth knowing before you pay grading fees.
These figures come from nightly market-data syncs verified against completed sales. Use the chart above to see the trend before you buy or sell.
