![Stoneforge Mystic [Foil] #31](/api/images/junkpal-products/cards/stoneforge-mystic-foil-31-magic-double-masters-card/img0/cover.webp)
Ungraded vs PSA 10 Stoneforge Mystic [Foil] #31: price difference
Stoneforge Mystic [Foil] #31 value — Ungraded $31 vs PSA 10 $72. PSA 10 sells for 2.32× Ungraded (+132%). Prices updated July 2026.
Medians of real sold listings per grade, updated July 2026 — how we compute values.
PSA 10 sells for 2.32× (+132%) the Ungraded price — a $41 difference per card.
PSA 10 sells for 2.77× (+177%) the Grade 9 price — a $46 difference per card.
Should you get this card graded?
Grading runs about $30 per card all-in. On Stoneforge Mystic [Foil] #31, the jump from Ungraded to PSA 10 is worth $41 (2.32×) — if your copy grades at the top, that premium can cover the fee. A grade below the top one changes the math, so run your exact numbers first.
Run the grading break-even math →Values are estimates from real sales data — not appraisals or offers. Some links earn JunkPal a commission at no cost to you (disclosure).