Ungraded vs Grade 8.0 Detective Comics #137 (1948): price difference
Detective Comics #137 (1948) value — Ungraded $489 vs Grade 8.0 $2100. Grade 8.0 sells for 4.29× Ungraded (+329%). Prices updated August 2026.
Medians of real sold listings per grade, updated August 2026 — how we compute values.
Grade 8.0 sells for 4.29× (+329%) the Ungraded price — a $1,611 difference per comic.
Grade 6.0 sells for 3.58× (+258%) the Ungraded price — a $1,261 difference per comic.
Should you get this comic graded?
Grading runs about $30 per comic all-in. On Detective Comics #137 (1948), the jump from Ungraded to Grade 8.0 is worth $1,611 (4.29×) — 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).