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Koffing.

Base Set · 051/102 · Common
updated Aug 14, 2026
Koffing 051/102 from Base Set
Raw market value · Normal
$0.91.
near mint, ungraded7 day -2.2% · 30 day +21.3%worth grading · clears $37.91
Price by printing
Normalthis page$0.91
Check live eBay pricesPrices above are what copies actually sold for, not what sellers are asking.

Price history and graded value

monthly median sold price
$1$3.2$10$32$100SEP '21MAY '23DEC '24AUG '26

Grading odds

PSA has graded 143 copies. Where they landed:

PSA 1037.8%
PSA 942.7%
PSA 812.6%
PSA 72.8%
6 or lower4.2%
✓ Worth grading
$63.91
average submission value

Weighting every grade by how often this card actually comes back at it, a submission is worth $63.91 on average. The card plus the $25 fee costs $26.00, so grading clears its cost by $37.91. Only 37.8% of copies reach a 10, which is why the top price is the wrong number to plan around.

More from Base Set

All 102 cards →
CharizardCharizard$825.38BlastoiseBlastoise$224.52VenusaurVenusaur$175.53RaichuRaichu$72.82MewtwoMewtwo$71.47AlakazamAlakazam$69.57

Looking for a different one? All 27 Koffing cards we price →

The same card in other sets

SM - Cosmic Eclipse243/236$36.78Base Set (Shadowless)051/102$34.88EX Team Rocket Returns61/109$32.21EX Delta Species72/113$28.66Great Encounters74/106$28.16Expedition114/165$26.08EX Deoxys62/107$14.99HeartGold SoulSilver70/123$13.50

What moves the price of this card

The Koffing on this page is the Normal printing from Base Set, and it trades at $0.91 in near mint condition. Only one printing of this card was produced, so there is no cheaper version to confuse it with.

Condition does most of the work below the surface. A copy with soft corners or a print line off centre trades well under the market price shown here, and a copy clean enough to grade trades well above it, which is why the PSA 10 sits at $127.50. Before you value your own copy, look at the corners under a light and check the centring on the back, where most cards give themselves away.