Ungraded vs MS66 1940 S Mercury Dime: price difference
1940 S Mercury Dime value — Ungraded $10 vs MS66 $77. MS66 sells for 7.7× Ungraded (+670%). Prices updated August 2026.
Medians of real sold listings per grade, updated August 2026 — how we compute values.
Ungraded vs MS66
$10→$77
MS66 sells for 7.7× (+670%) the Ungraded price — a $67 difference per coin.
MS62 vs MS66
$23→$77
MS66 sells for 3.35× (+235%) the MS62 price — a $54 difference per coin.
Should you get this coin graded?
Grading runs about $30 per coin all-in. On 1940 S Mercury Dime, the jump from Ungraded to MS66 is worth $67 (7.7×) — 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).