1999 Pokémon Game #51 Koffing - 1st Edition (PSA 10 GEM MINT)

See all 7 tracked copies of this card →

Asking price$675USDCListed price updated 1 h ago

Buy on Courtyard

Valuation

Fair market value✓ VerifiedGraded.Markets FMV · as of Jul 10 · how we price

ask +29%$525

Platform estimateCourtyard Est. Value · not our FMV

$623

Insured valuenot reported by platform

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Details

Type: Graded card
Grading company: PSA
Grade: 10 GEM MINT
Cert number: 27859109
Set: Pokémon Game
Card number: 51
Year: 1999
Language: English
Franchise: Pokémon

Price history — asks observed by Graded.Markets

Aug 12, 2026, 7:39 AM−0.7%$675
Aug 11, 2026, 12:14 PM−2.7%$680
Aug 8, 2026, 8:51 PM+1.3%$699
Aug 6, 2026, 4:35 PM+1.5%$690
Aug 2, 2026, 12:10 PM+17.2%$680
Aug 2, 2026, 9:00 AM+0.9%$580
Aug 1, 2026, 9:33 AM+4.5%$575
Jul 21, 2026, 6:47 AM−8.3%$550
Jul 17, 2026, 9:13 PM−5.5%$600
Jul 17, 2026, 11:12 AM+5.8%$635
Jul 16, 2026, 10:05 PM−24.5%$600
Jul 11, 2026, 12:55 PM+6.0%$795
Jul 6, 2026, 6:08 PM$750

Sales observed — marketplace sales only

Jul 17, 2026, 4:51 AM$600
Jun 23, 2026, 7:07 PMsold

Sales by grade — Courtyard comps for this card

PSA 10pop 632

Jul 10$600
Jun 11$502
Jun 5$880
Jun 4$372
May 31$600
May 17$600

PSA 9pop 1094

Jul 5$103
Jun 29$105
Jun 28$80.00
Jun 23$110
Jun 7$91.20
May 31$58.89

PSA 8pop 549

Jun 28$41.00
Jun 21$59.99
Jun 14$44.40
Jun 11$60.00
Jun 8$59.99
Jun 7$50.00

PSA 5pop 59

Jun 15$45.00
May 23$40.00
May 22$22.00
May 17$40.00
Feb 16$24.99

First seen Jul 6, 2026, 6:08 PM · last synced 1 h ago · listed Aug 21, 2026, 1:58 PM. Data aggregated from Courtyard; FMV figures combine licensed market data calibrated against observed sales, provided as-is.