![Koffing [Green Back] #109 Pokémon card from Japanese Topsun](https://storage.googleapis.com/images.pricecharting.com/ref36662d147bd3c01bc835f2430f7b666ae5f295c04ef4f978b88f1358f1ba448f/240.jpg)
Japanese
Koffing [Green Back] 109/248
Topsun· Language: Japanese
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Koffing [Green Back] #109 from Japanese Topsun currently trades at $8.49 raw, with PSA 10 copies reaching $237.79 — a 28.0x grade premium.
Current Prices (USD)
Ungraded
PSA 7
PSA 8
PSA 9
PSA 10
ACE 10
BGS 10 Black
CGC 10 Pristine
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Raw Price Trend
7d
—
30d
—
90d
—
180d
-22.0%
1y
+11.6%
2y
-12.9%
5y
—
Quick price facts
Koffing [Green Back] 109/248 from Topsun has a current raw market value of $8.49.
- Current raw value
- $8.49
- PSA 9 value
- $32.00
- PSA 10 value
- $238
- PSA 10 premium vs raw
- 28.0× raw
Collector Intel
28.0x
Raw → PSA 10
High-risk grade
3.8x
Raw → PSA 9
Grade multiplier
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 28x the raw price. The expected value accounts for the realistic probability.
$8
Buy Raw
~$25
Grading Fee
PSA Standard
$238
PSA 10 Value
+$204
Best Case (PSA 10)
if you pull a 10
Grade Multiples vs Raw
PSA 9$323.8x raw
PSA 10$23828.0x raw