CommonBase51/1021999PSA 9

Koffing 51/102 · Base PSA 9 price

PSA 9 · mint slab

$45

Fair buy $38 · sell $5247× rawUpdated today

Grade vs rawFull ladder →

Raw NM$1
PSA 9this page$4547×
PSA 10$126131×

PSA 9 sales: 16; 6 cert-verified
Last 90 days: 14; sells regularly
Confidence: Medium; 14 sales in 90 days, but prices vary widely.
Latest sale: 14d ago; one every ~144d

ViewingPSA 9Raw / ungraded →PSA 10 →1st Edition PSA 9 $79 →Shadowless PSA 9 $27 →

Our published graded price for this card, checked against every cert-verified sale below. An estimate, not an appraisal. How we price →

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PSA 9 slabs for sale right now

Live asks for a PSA 9 of this exact card · stock as of today. A raw copy or a reverse holo is a different product and is not in this list.

No live listings in our latest snapshot for this grade — the marketplaces above search it directly.

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Why $45? Cert-verified PSA 9 sales

Each sale is tied by PSA to a specific graded slab — click the cert to check the exact card, grade and serial on psacard.com. Outliers against the grade’s own median are dropped; qualified slabs are listed separately beneath.

Date	Sold via	Cert	Price
2026-08-23	eBay · fixedprice	listing #99527542	$45
2026-07-05	eBay · auction	listing #104460587	$36
2025-12-31	eBay · auction	listing #99527559	$21
2025-12-12	eBay · bestoffer	listing #53093074	$20
2025-07-21	eBay · bestoffer	listing #99527555	$28
2025-02-01	eBay · auction	listing #93850420	$15

3 of 6 were competitive auctions; 2 best offers and 1 fixed-price. A PSA 9 copy trades roughly every 144 days, the median gap between cert-verified sales.

PSA 9 price history

Monthly medians of cert-verified PSA 9 sales — 11 sales across 10 months, Oct 2022 to Aug 2026.

PSA 9 · index · latest

$45▲ 54%over 366 days

2025-10-03 → 2026-10-04

The recorded PSA 9 price index, held at the last cert-verified sale where our record lagged it, closing on the figure above. The line is the running level, so a single unusually cheap or dear sale does not spike it. Hover any day for its price on the line.

Latest $45 (Aug 2026, 1 sale) · ▲ 200% since Oct 2022

Every PSA 9 sale we can show you

Cert-verified sales, the eBay comps, our own ledger and Fanatics, in one list newest first. We hold 16 PSA 9 sales with a median of $45; the ledger names its most recent eight, which is what this table can link to.

GraderGradeCert-verified only 6

	Grade	Venue	Date	Certificate	Price
1999 English Pokemon Base Set Unlimited Koffing Card 51/102 PSA 9	PSA 9	eBay	2026-09-21	—	$64.99
Pokémon Koffing 51/102 Base Set Unlimited PSA 9 English Regular Common 1999	PSA 9	eBay	2026-09-12	—	$44.99
Pokemon Base Set Koffing PSA 9	PSA 9	eBay	2026-09-02	—	$36.00
1999 POKEMON BASE SET UNLIMITED #51 KOFFING PSA 9	PSA 9	eBay	2026-08-30	—	$32.04
1999 Pokemon Base Set Koffing #51 PSA 9 MINT	PSA 9	Fanatics	2026-08-28	—	$31.00
1999 Pokémon Base Koffing 51/102 · PSA 9	PSA 9	eBayFixedPrice	2026-08-23	99527542	$44.99
1999 POKEMON BASE SET 1999-2000 “4TH PRINT” #51 KOFFING PSA 9	PSA 9	eBay	2026-08-22	—	$44.99
1999 Pokemon Base Set Unlimited Koffing PSA 9	PSA 9	eBay	2026-08-21	—	$31.00
Koffing 51/102 1999 Pokemon Base Set Unlimited PSA 9 Mint!	PSA 9	eBay	2026-08-20	—	$59.00
1999 Pokémon Base Koffing 51/102 · PSA 9	PSA 9	eBayAuction	2026-07-05	104460587	$36.05
1999 Pokémon Base Koffing 51/102 · PSA 9	PSA 9	eBayAuction	2025-12-31	99527559	$20.50
1999 Pokémon Base Koffing 51/102 · PSA 9	PSA 9	eBayBestOffer	2025-12-12	53093074	$20.00
1999 Pokémon Base Koffing 51/102 · PSA 9	PSA 9	eBayBestOffer	2025-07-21	99527555	$28.00
1999 Pokémon Base Koffing 51/102 · PSA 9	PSA 9	eBayAuction	2025-02-01	93850420	$15.49

1–8 of 14 sales · 6 carry a PSA certificate, checkable on psacard.com.

How many PSA 9 copies exist

PSA’s cumulative census for this card. It counts resubmissions, so it skews toward nicer copies and overstates the rate a fresh submission should expect.

PSA 9 population

623

43.5% of 1,432 graded

Graded higher

395

PSA 10s above this grade

Total PSA graded

1,432

every grade, all time

Other graders at a 9: CGC 745 of 3,062 · BGS 3 of 10 · TAG 47 of 191. A CGC or BGS 9 is its own market and is not in the price above.

Is Koffing worth grading?

Every grade weighted by how often this card actually earns it — the PSA 9 outcome is one leg, not the whole answer.

Verdict

Not worth it

every grade weighted by its census share

Expected net

$-21

after fees, all grades

Comes back PSA 9

4320%

of submissions, by the census

PSA 9 outcome

$-37

PSA 9 net of raw and fee

Grading cost

$81

tier fee + shipping

Trader

Compare graders, and the live market

The verdict above is PSA's — the grader the population, the ROI table and the ladder on this page all use. Trader prices all three graders against each other and adds what the asking market is doing right now.

Trader plan and above →

PSA, CGC and Beckett side by side — each on its own population and fees, Beckett scored on the 9.5 its market pays for.
Lightly and moderately played — the same expected return for a copy that cannot gem.
Ask vs sold — what the live listings want, against what copies have really closed at.
Momentum — the 30-day median against the 90-day, per grade.
Where it sells higher — the Fanatics-versus-eBay premium, with the sale counts behind it.
Population history — the weekly PSA census, so you can see how fast 10s are arriving before you post the card.

Built on 58 graded sales and a population of 1,891,215 · fees as of 2026-10-03.

More Koffing and more from Base

Prices are raw near mint; PSA 10 shown where we have one.

Cite this PSA 9 pricefree with attribution

Citation

Koffing (Base #51) — PSA 9 market value USD $45, from 6 cert-verified sales. Source: CardTrack, https://cardtrack.com/pokemon/card/base/koffing-51/psa-9

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Frequently asked questions

How much is a PSA 9 Koffing (Base #51) worth?

As of 4 October 2026, a PSA 9 mint Koffing from Base is worth approximately $45, with a fair range of $38 to $52 — about 47× the $1 raw near-mint price.

Where does the PSA 9 price come from?

From 6 cert-verified PSA 9 sales, each tied by PSA to a specific slab with a public cert number — 3 at auction, 2 by best offer and 1 at a fixed price. A PSA 9 copy trades roughly every 144 days.

How many PSA 9 Koffing exist?

PSA has graded 623 copies of Koffing (Base #51) a 9, out of 1,432 submitted — 43.5% of the population, with 395 graded higher. The census counts resubmissions, so it overstates the gem rate a fresh submission should expect.

Should I grade my Koffing hoping for a PSA 9?

Probably not. Weighting every grade by how often this card earns it, expected value after the $81 grading fee is about $-21; this card comes back a PSA 9 about 4320% of the time.

Is a PSA 9 Koffing a good investment?

CardTrack tracks prices; it does not give investment advice. A PSA 9 Koffing has 16 recorded sales, 14 of them in the last 90 days, and the slab-history table above shows what happened to copies that sold twice. Read those before you read anyone's forecast.