Ungraded vs MS66 2018 P [WORLD WAR I CENTENNIAL PROOF] Modern Commemorative: price difference
2018 P [WORLD WAR I CENTENNIAL PROOF] Modern Commemorative value — Ungraded $65 vs MS66 $96. MS66 sells for 1.48× Ungraded (+48%). Prices updated August 2026.
Medians of real sold listings per grade, updated August 2026 — how we compute values.
MS66 sells for 1.48× (+48%) the Ungraded price — a $31 difference per coin.
Should you get this coin graded?
Grading runs about $30 per coin all-in. On 2018 P [WORLD WAR I CENTENNIAL PROOF] Modern Commemorative, the jump from Ungraded to MS66 is worth $31 (1.48×) — 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).