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Koffing [1999-2000] #51 Pokémon card from Base Set

Koffing [1999-2000] 51/102

Base Set

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Koffing [1999-2000] #51 from Base Set currently trades at $4.34 raw, with PSA 10 copies reaching $97.19 — a 22.4x grade premium. The card has moved up 33.1% over the past 30 days and up 31.9% over 90 days, suggesting sustained buying interest.
Current Prices (USD)
Ungraded
$4.34
PSA 7
$13.98
PSA 8
$30.82
PSA 9
$40.52
PSA 10
$97.19
ACE 10
—
BGS 10 Black
$630.00
CGC 10 Pristine
$104.00
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Raw Price Trend
7d
+21.2%
30d
+33.1%
90d
+31.9%
180d
+77.1%
1y
+73.6%
2y
—
5y
—

Quick price facts

Koffing [1999-2000] 51/102 from Base Set has a current raw market value of $4.34.

Current raw value
$4.34
PSA 9 value
$40.52
PSA 10 value
$97.19
Raw value 7d
+21.2%
Raw value 30d
+33.1%
PSA 10 premium vs raw
22.4× raw
View all cards from Base Set →
Collector Intel
22.4x
Raw → PSA 10
High-risk grade
9.3x
Raw → PSA 9
Grade multiplier
+33.1%
30d Price Move
Rising
Volatile
Price Stability
21.2% swing this week

Calculated from price history, PSA population data, and market trends. Not financial advice.

Grading Calculator

Based on PSA Standard tier (~$25 USD). Assumes a perfect PSA 10 result — actual outcome depends on card condition.

⚠️ High-variance grade. PSA 10 is 22x the raw price. The expected value accounts for the realistic probability.
$4
Buy Raw
~$25
Grading Fee
PSA Standard
$97
PSA 10 Value
+$68
Best Case (PSA 10)
if you pull a 10
Grade Multiples vs Raw
PSA 9$419.3x raw
PSA 10$9722.4x raw

Frequently asked questions

How much is Koffing [1999-2000] #51 from Base Set worth?+
Koffing [1999-2000] #51 from Base Set is currently worth Raw: $4.34, PSA 9: $40.52, PSA 10: $97.19 based on recent sold listings. Prices update daily from real eBay sales.
Is Koffing [1999-2000] #51 worth grading?+
The PSA 10 price of $97.19 is 22.4× the raw price of $4.34. After a ~$25 grading fee, a PSA 10 result would net approximately $92.85 — assuming the card grades a 10.
Where do PokePrices Koffing [1999-2000] #51 prices come from?+
Prices are tracked nightly from real sold listings on PriceCharting (raw, PSA 9 and PSA 10). PSA population data is sourced from PSA's public reports. We do not use asking prices — only confirmed sales.

Recent verified sales

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  • 30 Sep 2026Raw
    ebaycompleted-auctions-usedunknown
    $6.04
  • 18 Sep 2026Graded
    ebaycompleted-auctions-newunknown
    $30.82
  • 16 Sep 2026Raw
    ebaycompleted-auctions-usedlightly played
    $2.64
  • 7 Sep 2026Raw
    ebaycompleted-auctions-usedunknown
    $4.99
  • 23 Aug 2026Graded
    ebaycompleted-auctions-gradedunknown
    $44.99