Onix
Southern Islands · #3/18 · 2001
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 2026-07-08
Population data from PriceCharting, updated monthly.
Attacks
“This Pokémon burrows through the earth at high speed, looking for food. The tunnels it digs are used by Diglett as nests.”
How much is Onix #3/18 worth?
A raw copy of Onix #3/18 (Southern Islands, 2001) is worth about $51.28 right now, based on the latest market data from July 27, 2026.
Grading changes the math on this one: a PSA 10 is valued around $300.00, roughly 5.9x the raw price, while a PSA 9 sits near $95.00. 973 copies have been graded to date, and 26% 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.
