Ungraded vs Grade 8.0 The Transformers #66 (1990): price difference
The Transformers #66 (1990) value — Ungraded $20 vs Grade 8.0 $48. Grade 8.0 sells for 2.4× Ungraded (+140%). Prices updated July 2026.
Medians of real sold listings per grade, updated July 2026 — how we compute values.
Grade 8.0 sells for 2.4× (+140%) the Ungraded price — a $28 difference per comic.
Grade 6.0 sells for 1.75× (+75%) the Ungraded price — a $15 difference per comic.
Should you get this comic graded?
Grading runs about $30 per comic all-in. On The Transformers #66 (1990), the jump from Ungraded to Grade 8.0 is worth $28 (2.4×) — 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).