Koffing

Base · #51/102 · Common · 1999

All 67 Koffing cards ranked by value →
$0.96
Market price 18.5% (30d)
Prices as of Aug 22, 2026
HP 50GrassBasicArt · Mitsuhiro Arita
6,222graded pop
19%gem rate
3.6×PSA 10 vs raw
-62%off ATH $3.81 · Aug 2026
$10.58EV to grade — don't
Market data

Printings & price history

Unlimited 3.2% 7d$0.96
Mid $0.56

Loading chart…

Live listings

Buy it now on eBay

Loading live listings…

Live from eBay · affiliate links support CardPrice · see recent sold results →

Graded market

Graded values

PSA 10 report →updated 2026-08-22
Grade 6 est.$1.39
Grade 5 est.$1.17
Grade 4 est.$0.96
Grade 3 est.$0.80
Grade 2 est.$0.66
Grade 1 est.$0.55

Grades 1–6 are estimates modeled from the raw price — PSA/CGC/BGS 7–10 and Ungraded are live tracked market values.

PSA 10 price history$123.83

PSA 10 chart is building — graded values are tracked nightly, a new point appears each day.

Graded population census · updated 2026-07-07

CGC1,621 graded · 261 gem 10
PSA143 graded · 54 gem 10

Population data from PriceCharting, updated monthly.

More Koffing cards all 67 ranked by value →

Attacks

10Foul Gas
Flip a coin. If heads, the Defending Pokémon is now Poisoned; if tails, it is now Confused.

Because it stores several kinds of toxic gases in its body, it is prone to exploding without warning.

How much is Koffing #51/102 worth?

As of August 22, 2026, Koffing #51/102 from Base sells for around $0.96 in raw, ungraded condition. Across the 3 printings we track, copies run anywhere from $0.10 to $9,999.00 depending on the version you're holding.

Grading changes the math on this one: a PSA 10 is valued around $123.83, roughly 129.0x the raw price, while a PSA 9 sits near $31.14. 2,699 copies have been graded to date, and 23% 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 Koffing has moved over time.

Collecting Base?Full master set guide — every card, chase list, and completion cost