Ungraded vs PSA 10 Underground Sea #290: price difference
Underground Sea #290 value — Ungraded $813 vs PSA 10 $1380. PSA 10 sells for 1.7× Ungraded (+70%). Prices updated July 2026.
Medians of real sold listings per grade, updated July 2026 — how we compute values.
PSA 10 sells for 1.7× (+70%) the Ungraded price — a $567 difference per card.
Grade 9 sells for 1.47× (+47%) the Ungraded price — a $383 difference per card.
Should you get this card graded?
Grading runs about $30 per card all-in. On Underground Sea #290, the jump from Ungraded to PSA 10 is worth $567 (1.7×) — 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).