Ungraded vs PSA 10 Underground Sea: price difference
Underground Sea value — Ungraded $1342 vs PSA 10 $6099. PSA 10 sells for 4.54× Ungraded (+354%). Prices updated July 2026.
Medians of real sold listings per grade, updated July 2026 — how we compute values.
PSA 10 sells for 4.54× (+354%) the Ungraded price — a $4,757 difference per card.
PSA 10 sells for 3.21× (+221%) the Grade 9 price — a $4,200 difference per card.
Should you get this card graded?
Grading runs about $30 per card all-in. On Underground Sea, the jump from Ungraded to PSA 10 is worth $4,757 (4.54×) — 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).