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Sealed products › Steam Siege

Steam Siege Booster Box

Booster Box of Steam Siege (STS), released August 3, 2016. Market price from TCGplayer, updated daily.

$1,437TCGplayer market price, 2026-11-01
36booster packs inside
$39.92per pack (single pack $32.85)

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Is the Booster Box worth it?

Opened, the booster box costs you $39.92 a pack, against $32.85 for a single Steam Siege booster pack: 22% more than single packs, so you pay for the extras or the box itself. The 9 hits of Steam Siege (Double Rare and up) are worth $181 together; the five most valuable make up 92% of that, so most boxes miss the cards that carry the value. Buying the single card you want is usually cheaper than opening for it; see the Steam Siege chase cards.

Steam Siege chase cards you can pull

Gardevoir EX 116 Steam Siege
Gardevoir EX $110
Secret Rare
M Gardevoir EX 112 Steam Siege
M Gardevoir EX $57.40
Rare Ultra
Volcanion EX 115 Steam Siege
Volcanion EX $35.87
Secret Rare
M Steelix EX 109 Steam Siege
M Steelix EX $28.26
Rare Ultra
Gardevoir EX 111 Steam Siege
Gardevoir EX $27.92
Rare Ultra
M Gardevoir EX 79 Steam Siege
M Gardevoir EX $23.44
Rare Holo EX
Steelix EX 108 Steam Siege
Steelix EX $17.60
Rare Ultra
Professor Sycamore 114 Steam Siege
Professor Sycamore $13.07
Rare Ultra

Full Steam Siege card list and checklist →

Other Steam Siege products

ProductPricePacksPer pack
Elite Trainer Box$1,800––
Booster Pack$32.851–

Booster boxes from other sets

SetReleasedPricevs launch
Delta Reign2026-11$229+42%
Pitch Black2026-07$180+11%
Chaos Rising2026-05$183+13%
Perfect Order2026-03$173+7%
Phantasmal Flames2025-11$387+139%
Mega Evolution2025-09$300+85%
Mega Evolution2025-09$299+85%
Destined Rivals2025-05$381+136%
Journey Together2025-03$206–
Journey Together2025-03$230–

All sealed product prices →

Questions

How much is the Steam Siege Booster Box worth?
About $1,437, the TCGplayer market price (average of recent sales) on November 1, 2026.
How many packs are in the Steam Siege Booster Box?
36 Steam Siege booster packs, so you pay about $39.92 per pack at today's price.
When did Steam Siege come out?
Steam Siege was released on August 3, 2016 in English.

Prices: TCGplayer market price (the average of recent sales) via TCGCSV, 2026-11-01. Sealed prices move fast around release and restocks; check the live listing before you buy.