Ungraded vs Grade 8.0 Sonic the Hedgehog #138 (2004): price difference
Sonic the Hedgehog #138 (2004) value — Ungraded $15 vs Grade 8.0 $24. Grade 8.0 sells for 1.6× Ungraded (+60%). Prices updated August 2026.
Medians of real sold listings per grade, updated August 2026 — how we compute values.
Grade 8.0 sells for 1.6× (+60%) the Ungraded price — a $9 difference per comic.
Grade 6.0 sells for 1.27× (+27%) the Ungraded price — a $4 difference per comic.
Should you get this comic graded?
Grading runs about $30 per comic all-in. On Sonic the Hedgehog #138 (2004), the jump from Ungraded to Grade 8.0 is worth $9 (1.6×) — at today's prices that doesn't cover the fee — grading this one is for the collection, not the flip. 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).