Ungraded vs MS66 1918 S Mercury Dime: price difference
1918 S Mercury Dime value — Ungraded $11 vs MS66 $4479. MS66 sells for 407.18× Ungraded (+40618%). Prices updated August 2026.
Medians of real sold listings per grade, updated August 2026 — how we compute values.
MS66 sells for 407.18× (+40618%) the Ungraded price — a $4,468 difference per coin.
MS62 sells for 24.36× (+2336%) the Ungraded price — a $257 difference per coin.
Should you get this coin graded?
Grading runs about $30 per coin all-in. On 1918 S Mercury Dime, the jump from Ungraded to MS66 is worth $4,468 (407.18×) — 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).