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Booster Box packaging
Pokémon XY Era · Aug 3, 2016

Steam Siege
Booster Box

Spot $1,500
vs MSRP +1289%
Alpha vs S&P TR +997 pp
CAGR +30.3%
Compare to S&P 500 → Buy on TCGplayer See sealed listings on eBay

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This product is in the catalog but has thin price history. The chart activates after ~30 days of nightly snapshots, or when a TCGplayer affiliate ID is linked and live prices flow in.

Era context

Steam Siege Booster Box is part of the XY Era. This basket carries an alpha of +997 pp vs the S&P 500 TR over the matched period and a CAGR of +30.3%.

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Sealed prices are eBay asking-price floors, not sale comps. Each spot is the lowest credible active ask across current eBay listings, refreshed nightly; history accumulates from daily snapshots of that floor. Sale-based pricing arrives with eBay Marketplace Insights integration.