Professor Sycamore #114

Steam Siege · 2016 · Rare Ultra

Medium confidence 9th most valuable of 210 priced cards in Steam Siege — top 4%

Solid guide price from market data — liquid, well-sampled card.

Built from United States market data — recent sales of this card in that market, refreshed weekly.

A PSA 10 of this card sells for about 14.6× the ungraded price — $10.52 raw against $153.13 graded.

We began recording US prices as their own series in August 2026, so there are not yet enough readings to chart a US trend for this card. It will appear here as they accumulate.

US guide prices, with the UK market alongside — updated 19 August 2026. Each market is priced from real market data in that market. Estimates for collection tracking — not an appraisal or a quote.

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