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XY series
Buy Steam Siege Pokémon Cards UK
- Released
- 3 August 2016
- Cards
- 116
- Set code
- STS
- Sealed products
- 19
Steam Siege sealed products
19 products
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The Steam Siege cards everyone is chasing
The most valuable cards in the set, the ones that make a box worth opening. Values are for a clean, ungraded copy.
Gardevoir-EX
#116 · Rare Secret
$126 · about £94.48
PSA 10: $2,080
M Gardevoir-EX
#112 · Rare Ultra
$48.38 · about £36.28
PSA 10: $600
Volcanion-EX
#115 · Rare Secret
$42.40 · about £31.80
PSA 10: $1,100
M Steelix-EX
#109 · Rare Ultra
$29.99 · about £22.49
PSA 10: $599
Gardevoir-EX
#111 · Rare Ultra
$24.99 · about £18.74
PSA 10: $596
M Gardevoir-EX
#79 · Rare Holo EX
$20.26 · about £15.19
PSA 10: $240
Steelix-EX
#108 · Rare Ultra
$19.70 · about £14.77
PSA 10: $1,500
Professor Sycamore
#114 · Rare Ultra
$12.20 · about £9.15
PSA 10: $160
M Steelix-EX
#68 · Rare Holo EX
$9.99 · about £7.49
PSA 10: $194
Volcanion-EX
#107 · Rare Ultra
$9.89 · about £7.42
PSA 10: $704
Magearna-EX
#110 · Rare Ultra
$9.06 · about £6.79
PSA 10: $331
Xerneas BREAK
#82 · Rare BREAK
$7.57 · about £5.68
PSA 10: $138
US market values via CardTrack, checked 18 October 2026. They show what the cards change hands for, not what we will charge.
About Steam Siege
Steam Siege is an English Pokémon set in the XY series released on 3 August 2016, with 116 cards. Every sealed product from the set is listed below, and singles can be requested by email. Nothing is on sale until the shop opens; use the alert link on any product and we will email you once, when it arrives.
Ask for cards from this set
The request tool is not switched on yet. Until it is, email hello@tcgemporium.com with the card names and numbers you are after. We will reply when we have them, and nothing else.
