1999 Base #56 Onix
Unknown · Checklist · Pokemon
AgentGrail Market Value
Raw
$17.85
PSA 9
$125.88
PSA 10
$177.50
Based on recent eBay sold listings and market sales data · updated Jul 5, 2026 · How we price · Estimates, not offers.
Find on eBay — Base
As an eBay Partner, AgentGrail may be compensated when you click through.Frequently Asked Questions
How much is the 1999 Base #56 Onix worth?▼
Based on recent eBay sold listings in our database, raw (ungraded) copies of the 1999 Base #56 Onix are priced around $18, while PSA 10 gem mint copies sell for around $178. Prices fluctuate with market demand and card condition.
Is the 1999 Base #56 Onix a rookie card?▼
No. The 1999 Base #56 Onix is not a rookie card. For Onix's rookie cards, look for the RC designation — typically from their debut year.
What set is the 1999 Base #56 Onix from?▼
This card is from the 1999 Base set, produced by Unknown. Browse the full checklist for all cards in this set.
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