![Shellos [Reverse Holo] #28 Pokémon card from Steam Siege](https://storage.googleapis.com/images.pricecharting.com/6ca46e953f897d23de06fcf5f61b75974b3c8a52d390f1575867f88c117c3d04/240.jpg)
Shellos [Reverse Holo] 28/114
Steam Siege
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Shellos [Reverse Holo] #28 from Steam Siege currently trades at $0.90 raw, with PSA 10 copies reaching $27.50: a 30.6x 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
-9.1%
30d
—
90d
—
180d
-17.4%
1y
-29.7%
2y
-32.3%
5y
-23.1%
Quick price facts
Shellos [Reverse Holo] 28/114 from Steam Siege has a current raw market value of $0.90.
- Current raw value
- $0.90
- PSA 9 value
- $18.70
- PSA 10 value
- $27.50
- Raw value 7d
- -9.1%
- PSA 10 premium vs raw
- 30.6× raw
Collector Intel
30.6x
Raw → PSA 10
High-risk grade
20.8x
Raw → PSA 9
Grade multiplier
Moderate
Price Stability
9.1% swing this week
Calculated from price history, PSA population data, and market trends. Not financial advice.
Grading Calculator
Figures below are the gross raw-to-PSA-10 spread. PSA grading fees vary by card value and service tier — check psacard.com/services for the fee applicable to this card. Assumes a perfect PSA 10; actual outcome depends on card condition.
⚠️ High-variance grade. PSA 10 is 31x the raw price. The expected value accounts for the realistic probability.
$1
Raw Price
$28
PSA 10 Value
+$27
Gross Premium (PSA 10)
before PSA fees
Grade Multiples vs Raw
PSA 9$1920.8x raw
PSA 10$2830.6x raw

