Pokemon Base Set · #51 · Jun 1, 1995

Koffing$129.99 in a PSA 10.

Raw, it’s a $0.99 card. Slabbed as a PSA 10 it sells for 131× that, and PSA has only ever handed out 54 of them.

Check gradesUpdated 6 h ago

price-history

PSA 10, last year

$129.99

Flat over 30 days

Avg, 90 days$146.57

Sales, 90 days8

Vs raw131×

Market priceA recorded saleBefore our sale records (sales still happened)

grades

sales

PSA 10 · median of last 5 sales

$130

131.3× raw
pop as of Nov 5

143graded by PSA

38%gem rate, 1 in 3

1,802CGC · BGS

Recent PSA 10 sales

30 recorded

October · 5 sales · median $130 · −35% vs Sep
25	eBay	1999 POKEMON BASE SET UNLIMITED #51 KOFFING PSA 10 #51	+22%	$139.26
23	eBay	1999 POKEMON BASE SET UNLIMITED #51 KOFFING PSA 10 #51	−9%	$114.26
13	eBay	1999 Pokemon Base Set Koffing 51/102 PSA 10	−4%	$124.95
13	eBay	Pokémon 1999 Base Set Koffing 51/102 Regular Common English PSA 10 Gem Mint 051/102	−13%	$129.99
6	eBay	Koffing (PSA GEM MINT 10) - Unlimited - Pokemon Base Set 1999 #51/102 051/102	−25%	$150.00
September · 1 sale · median $200 · +43% vs Aug
22	eBay	1999 Pokémon Koffing Unlimited 51/102 Base Set - PSA 10 51/102	+0%	$199.99
August · 3 sales · median $140 · +10% vs Jul
28	eBay	1999 POKEMON BASE SET UNLIMITED #51 KOFFING PSA 10 #51	+73%	$199.00
10	eBay	Pokemon Cards: Base Set Common: Koffing 51/102 PSA 10 #51	−18%	$115.07
6	eBay	PSA 10 Koffing 51/102 1999 Pokemon Base Set GEM MINT Vintage WOTC 051/102	+10%	$139.90
July · 1 sale · median $128 · −2% vs May
13	eBay	Pokemon Koffing Base Set Unlimited 51/102 PSA 10 Gem Mint 51/102	+2%	$127.50
May · 2 sales · median $130 · +13% vs Apr
29	eBay	1999 POKEMON BASE SET UNLIMITED #51 KOFFING PSA 10 #51	−7%	$125.00
29	eBay	Koffing 51/102 Base Set 1999 Unlimited Pokemon PSA 10 GEM MINT LOW POP of 54 051/102	+17%	$134.56
April · 1 sale · median $115 · +20% vs Mar
17	eBay	1999 Pokemon Base Set Unlimited #51 Koffing Gem Mt PSA 10 #51	+26%	$115.00
March · 4 sales · median $96 · −2% vs Jan
30	eBay	Pokemon Koffing Base Set Unlimited #51 PSA 10 Gem Mint	−1%	$91.00
30	eBay	1999 POKEMON BASE SET UNLIMITED #51 KOFFING PSA 10 #51	−8%	$92.00
14	eBay	Koffing 51/102 Base Set (Unlimited) Pokemon Card PSA 10 #PSA CGC BGS	—	$100.00
7	eBay	Pokémon Koffing Base Set #51 1999 PSA 10 GEM MT Regular English 051/102	+2%	$100.00
January · 1 sale · median $98 · +48% vs Dec
19	eBay	Koffing 51/102 Base Set (Unlimited) Pokemon Card PSA 10 #PSA CGC BGS	+48%	$98.00
December 2025 · 1 sale · median $66 · −29% vs Nov
7	eBay	KOFFING #51 PSA 10 1999 POKEMON Base Set Unlimited WOTC #51	−34%	$66.02
November 2025 · 2 sales · median $93 · +29% vs Oct
22	eBay	Pokemon Koffing Base Set Unlimited #51 PSA 10 Gem Mint	+17%	$100.00
17	eBay	KOFFING #51 PSA 10 1999 POKEMON Base Set Unlimited WOTC	+19%	$85.50
October 2025 · 1 sale · median $72 · +64% vs Sep
17	eBay	1999 Pokemon Game Base Set Koffing #51, PSA Grade 10 Gem Mint #51	+64%	$72.00
September 2025 · 1 sale · median $44 · −43% vs Aug
16	eBay	1999 Pokemon Base Set Koffing 51/102 PSA 10 Gem Mint Rare Card Wotc Vintage	−48%	$44.00
August 2025 · 4 sales · median $77 · −6% vs Jul
25	eBay	1999 Pokemon Koffing #51 Base Set Unlimited English 51/102 PSA 10 GEM MINT #51	+93%	$84.99
18	eBay	1999 POKEMON GAME BASE SET 51 KOFFING PSA 10 GEM MINT #51	−37%	$44.00
16	eBay	Koffing Pokemon 1999 PSA Gem Mint 10 Base Set 051/102	−16%	$70.00
3	eBay	Pokemon 1999 Base Set Unlimited Koffing 51/102 PSA 10	−0%	$83.58
July 2025 · 2 sales · median $82 · +26% vs Jun
29	eBay	1999 POKEMON GAME BASE SET 51 KOFFING PSA 10 GEM MINT #51	+5%	$83.99
13	eBay	1999 Koffing Base Set Unlimited Pokemon PSA 10 Gem Mint #51	+23%	$80.00
June 2025 · 1 sale · median $65
8	eBay	Pokemon Koffing Base Set Unlimited #51 PSA 10 Gem Mint	—	$65.00