Ungraded vs MS66 1891 O Seated Liberty Quarter: price difference
1891 O Seated Liberty Quarter value — Ungraded $312 vs MS66 $43208. MS66 sells for 138.49× Ungraded (+13749%). Prices updated August 2026.
Medians of real sold listings per grade, updated August 2026 — how we compute values.
MS66 sells for 138.49× (+13749%) the Ungraded price — a $42,896 difference per coin.
MS66 sells for 12.74× (+1174%) the MS62 price — a $39,816 difference per coin.
Should you get this coin graded?
Grading runs about $30 per coin all-in. On 1891 O Seated Liberty Quarter, the jump from Ungraded to MS66 is worth $42,896 (138.49×) — 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).