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The 10 Most Valuable Steam Siege Cards
Steam Siege (XY, 2016) has 114 cards. Here are the ten most valuable by current TCGplayer market price, led by Gardevoir-EX at around $108. Prices move constantly, so treat this as a live snapshot rather than a fixed ranking.
Prices as of 2026/09/27.
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Ultra Pro One-Touch Magnetic Holder (35pt)
Pull a card like this? A magnetic one-touch holder keeps a $108 card safe and on display.
Want the rest? See the full Steam Siege card list — including the commons and printable checklists to build the set in a binder — or browse all sets.
Prices are TCGplayer market values from our latest data refresh and will change over time. Card images © The Pokémon Company.