![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 $0.87 raw, with PSA 10 copies reaching $27.50 — a 31.6x grade premium. Price is up 61.1% in the last 30 days, though the 90-day trend tells a different story at -13.0% — worth watching for a clearer direction.
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
+0.0%
30d
+61.1%
90d
-13.0%
180d
-25.6%
1y
-45.3%
2y
-34.1%
5y
-12.1%
Quick price facts
Shellos [Reverse Holo] 28/114 from Steam Siege has a current raw market value of $0.87.
- Current raw value
- $0.87
- PSA 9 value
- $18.88
- PSA 10 value
- $27.50
- Raw value 30d
- +61.1%
- PSA 10 premium vs raw
- 31.6× raw
Collector Intel
31.6x
Raw → PSA 10
High-risk grade
21.7x
Raw → PSA 9
Grade multiplier
+61.1%
30d Price Move
Rising
Steady
Price Stability
0.0% 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 32x the raw price. The expected value accounts for the realistic probability.
$1
Buy Raw
~$25
Grading Fee
PSA Standard
$28
PSA 10 Value
+$2
Best Case (PSA 10)
if you pull a 10
Grade Multiples vs Raw
PSA 9$1921.7x raw
PSA 10$2831.6x raw