Ungraded vs Grade 8.0 Supergirl #21 (1998): price difference
Supergirl #21 (1998) value — Ungraded $6 vs Grade 8.0 $700. Grade 8.0 sells for 116.67× Ungraded (+11567%). Prices updated August 2026.
Medians of real sold listings per grade, updated August 2026 — how we compute values.
Grade 8.0 sells for 116.67× (+11567%) the Ungraded price — a $694 difference per comic.
Grade 8.0 sells for 58.33× (+5733%) the Grade 6.0 price — a $688 difference per comic.
Should you get this comic graded?
Grading runs about $30 per comic all-in. On Supergirl #21 (1998), the jump from Ungraded to Grade 8.0 is worth $694 (116.67×) — 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).