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Check your printing9 different Koffing printings exist — is this your card? Base #51
Koffing Base #51 Pokémon card
Common

Koffing

Base · 51/102 · Illustrated by Mitsuhiro Arita
50 HPGrassPokémonBasic

Market value · ungraded

$0.96 47.7% · 30d
Confidencehigh
Sales · 90 days2
Last sale$31 PSA 9 · 27 Jun 2026
Cert-verified10 PSA sales
Sold prices, not asking. eBay. Updated 20 August 2026. Estimate, not an appraisalhow we price →

What's your copy worth?

What's your copy worth?
Not sure which condition? Grade it from a photo
Estimated value · Near Mint
$0.96

What this price is based on

Medium confidence

7 sales in 90 days — enough for a guide, not a guarantee.

Median · PSA 9$41.1022 sales
Trimmed mean$55.20outliers removed
Range$21.60$91.20lowest to highest sale
Sales rate16.8/mo108 recorded

Recent PSA 9 sales

By grade

  • PSA 9$41.1022 sales
  • CGC 9$16.8015 sales
  • CGC 10$30.0015 sales
  • PSA 8$46.806 sales
  • PSA 10$4406 sales
  • Lot$8.406 sales
  • CGC 5.5$6.506 sales
  • CGC 0.5$14.005 sales

From 108 completed sales recorded between Feb 26, 2024 and Jul 27, 2026. Sold prices only — asking prices are never counted.

Grade it or not

GRADE IT

Based on 102 graded sales and 1,891,215 pop-report entries for a near-mint copy.

See the numbers — Trader plan and above

Buy this card

Is it worth it?

An AI market read of this card — value, momentum, grading economics, liquidity. It lays out the data; you decide.

Sign in to analyse

Koffing is a Common Pokémon card from Base (#51), illustrated by Mitsuhiro Arita. It's a Basic Grass-type Pokémon with 50 HP, weak to Psychic ×2. Its current blended market value is $0.96 ungraded, with a PSA 10 worth around $128 — a gem-mint grading premium of roughly 133× the raw value. Prices are aggregated across marketplaces — raw and graded, updated daily and shown in your local currency.

Prices last updated 20 August 2026.

The receipts

Graded a PSA 10? See its cert-verified sales and price history — individual sales PSA tied to a specific slab, each with a cert number you can check.

Price history · Raw

1 Sept 202320 Aug 2026
Latest
$0.96
Period high
$27.44
Period low
$0.64
Change
92.5%
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Verified sales history12 in 90 daysreal completed listings

Last sold
$31
PSA 9 · 27 Jun 2026
Typical PSA 9
$38
Sales · last 90 days
2
How often it sells
Rarely sells
0 in last 30 days

Real completed eBay sales, refreshed periodically. Grade read from the listing title. Implausibly priced listings (lots, proxies, empty slabs) and wrong-variant sales are filtered out. Links to eBay are affiliate links — we may earn a commission.

DateGradePriceCert
17 Jul 2026PSA 7$13.48#141884480
5 Jul 2026PSA 9$36.05#104460587
29 May 2026PSA 10$134.45#82534148
21 Apr 2026PSA 8$24.88#56282921
31 Dec 2025PSA 9$20.50#99527559
12 Dec 2025PSA 9$20.00#53093074
7 Dec 2025PSA 8$23.00#82263155
1 Sep 2025PSA 10$93.02#54430539
23 Aug 2025PSA 10$129.99#101211846
21 Jul 2025PSA 9$28.00#99527555

Demand & liquidity

Thin · Rarely sellsDemand 44/100
Sales · 30d0
Sales · 90d2
Price momentum+48%
PSA 9
$38

Last sold $31 · PSA 9 · 27 Jun 2026

Should you grade it?

$20

Expected return across every likely grade, after fees — the realistic average, not the best case. Only 28.4% of copies gem (PSA 10 best case +$55); most land at PSA 9 or below.

Gem rate (est.)28.4%
Expected return$20
PSA 10 best case+$55
Break-evenPSA 10+
VerdictNot worth it

The odds

Koffing is a Commoncard — a guaranteed slot in every pack, not a rarity gamble, so there's no pull-odds figure for it.

PSA 10 (gem mint)28.4%391 of 1,378
PSA 943.2%595 of 1,378
PSA graded so far1,378
Gem Mint 10391
Total graded1,378

Estimates only. Pack odds come from CardTrack's pack model (the same one behind the pack simulator) — not an official rate. Grading odds are the real cumulative PSA population, which skews toward nicer, resubmitted copies, so it overstates the true first-submission gem rate. Full grade-by-grade breakdown below.

Grade-by-grade ROI & risk-adjusted outcomesNet vs raw per target grade, plus the probability-weighted distribution
Target gradeEst. valueGrading feeNet vs rawMultiple
PSA 10$127.50$71+$55132.8×
PSA 9$36.03$70$3537.5×
PSA 8$27.37$70$4428.5×

⚖️ Risk-adjusted return

Best case isn't the whole story. Weighting every grade by how often it actually happens, across 1,378 PSA-graded copies:

Likely outcomeChanceValue
PSA 1028.4%$128.00
PSA 943.2%$36.00
PSA ≤828.4%$1.00

Net = graded value − raw value − grading cost (tier fee + ~$20 round-trip shipping), using PSA fees as of 2026-06-28; the paused PSA Value tier is excluded so this isn't overstated. Gem rate is estimated from cumulative PSA population, which skews toward nicer, resubmitted copies — so it overstates the true grade rate. Treat it as a guide, not a guarantee.

Population across gradersPSA, CGC & BGS — every grade, with gem rates

Only 28% of 1,378 PSA-graded Koffing copies are a gem-mint 10 (391 of 1,378) — the rest grade lower.

PSA1,378 gradedPSA 10 · 391 · 28% gem
10391
9595
8.54
8219
775
646
526
410
34
22
12
CGC5,876 gradedCGC 10 · 706 · 12% gem
10706
9.5224
91,320
8.51,164
8780

Real graded population from PSA, CGC & BGS — a lower gem rate means a Koffing 10 is harder to pull.

Copies for sale right now

Check recent sold prices

Affiliate links — we may earn a commission. Prices shown are sold-based, not sponsored placements.

All grades & conditions

Every grade we pricePSA / CGC / BGS ladder with per-grade population
Graded prices
Ungraded (raw)$0.96
PSA graded price estimates by grade
GradeRelative valuePrice
PSA 10pop 391$128$108$147
PSA 9pop 595$36$31$41
PSA 8pop 219$27$23$31
PSA 7pop 75$10$8$11
“Sold” = median of real recent sold listings at that grade (eBay or Fanatics Collect — hover a badge to see which). Other figures are blended marketplace estimates. Confidence reflects source backing and price spread — not PSA-official values.
Raw condition ladderNM → damaged, with real sold medians where we have them
Raw price by condition
1st Edition · live market via TCGplayer
NMNear Mint$0.96
LPLightly Played$0.45
MPModerately Played$0.45
HPHeavily Played$0.45
DMGDamaged$0.34
7-day 0.2%
30-day 0.2%
90-day 15.7%
All-time high$1
All-time low$0
Other printingsUnlimited · $7.21
What NM / LP / MP actually mean — and how much they cost
Market dataCross-market spread, EU price, momentum & community buzz

Market signal

Momentum · 30dRising +48%

Derived from this card's 90-day price history, recent trend and cross-market price gap. Informational, not advice.

Card textAttacks, abilities, weakness / resistance / retreat
Foul Gas10
Grass · Grass

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

Weakness Psychic ×2Retreat 1

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

About the PokémonSpecies, generation, evolution line
Poison Gas PokémonGEN IKoffingWeezing

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

Card detailsSet, rarity, artist, Pokédex & specs
Number#51
RarityCommon
SupertypePokémon
SubtypesBasic
TypeGrass
HP50
WeaknessPsychic ×2
Retreat cost1
National Pokédex#109
Card IDbase1-51
SourceAggregated marketplaces

Other Koffing cards

There are 9 different Koffing printings — make sure you're valuing the right one. This is Base #51 (Common).

More from Base

Frequently asked questions

How much is Koffing (Base #51) worth?

As of 20 August 2026, Koffing from Base is worth approximately $0.96 ungraded (near-mint), and around $128 in PSA 10 gem mint. Values are blended from real Cardmarket, eBay sold and TCGplayer prices and update daily.

What is the PSA 10 price for Koffing?

A PSA 10 (gem mint) Koffing from Base is worth around $128 — roughly 133× the raw ungraded value of $0.96.

Should I grade my Koffing?

A PSA 10 sells for about $128 versus $0.96 raw — roughly a 133× uplift. Grading is worth it when that premium comfortably beats the grading fee and the card is clean enough to have a real shot at a 10. See the "Should you grade it?" estimate above for net profit per grade.

Is Koffing rare?

Koffing is a Common card from Base (card #51), illustrated by Mitsuhiro Arita. Its current blended market value is $0.96 ungraded.

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Citation
Koffing (Base #51) — Pokémon market value $0.96, PSA 10 $127.50. Source: CardTrack, https://cardtrack.com/pokemon/card/base/koffing-51
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