Koga
Challenge from the Darkness · #promo · Rare · 1998JPN
Price history
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Graded values
Grades 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 2026-09-18
Population data from PriceCharting, updated monthly.
How much is Koga #promo worth?
As of September 27, 2026, Koga #promo from Challenge from the Darkness sells for around $2.70 in raw, ungraded condition.
Grading changes the math on this one: a PSA 10 is valued around $369.50, roughly 136.9x the raw price, while a PSA 9 sits near $50.00. 129 copies have been graded to date, and 26% of them came back a 10 — worth knowing before you pay grading fees.
We update this valuation every night from live market data and verify it against real completed sales — see the chart above for how Koga has moved over time.
