Graded Market · 51 completed sales
Professor Sycamore graded prices.
As of August 19, 2026, Professor Sycamore (Steam Siege #114) in PSA 10 sells for a median of $143.00, based on 51 real eBay completed sales; the raw copy’s reference price is $10.69 — a 13.4× grading premium at the top grade.
Across Steam Siege, PSA 10 copies sell for 73.1× their raw reference price on average (27 cards, 772 PSA 10 completed sales tracked).
PSA · Professor Sycamore
| Grade | Median | Sales | vs Raw |
|---|---|---|---|
| Gem Mint 10 | $143.00 | 20 | 13.4× |
| Mint 9 | $30.00 | 19 | 2.8× |
| NM 7 | $17.25 | 6 | 1.6× |
Medians of real eBay completed sales per grade; small sample sizes deserve caution. Prices are dated reference values — cite them with the as-of date above. Attribution: CardIntel (cardintel.io). See the methodology.