Ungraded vs Grade 8.0 Star Trek #31 (1975): price difference
Star Trek #31 (1975) value — Ungraded $4 vs Grade 8.0 $76. Grade 8.0 sells for 19× Ungraded (+1800%). Prices updated August 2026.
Medians of real sold listings per grade, updated August 2026 — how we compute values.
Grade 8.0 sells for 19× (+1800%) the Ungraded price — a $72 difference per comic.
Grade 6.0 sells for 9.75× (+875%) the Ungraded price — a $35 difference per comic.
Should you get this comic graded?
Grading runs about $30 per comic all-in. On Star Trek #31 (1975), the jump from Ungraded to Grade 8.0 is worth $72 (19×) — 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).