Ungraded vs MS66 1999 S [SILVER DELAWARE PROOF] State Quarter: price difference
1999 S [SILVER DELAWARE PROOF] State Quarter value — Ungraded $19 vs MS66 $175. MS66 sells for 9.21× Ungraded (+821%). Prices updated August 2026.
Medians of real sold listings per grade, updated August 2026 — how we compute values.
Ungraded vs MS66
$19→$175
MS66 sells for 9.21× (+821%) the Ungraded price — a $156 difference per coin.
Should you get this coin graded?
Grading runs about $30 per coin all-in. On 1999 S [SILVER DELAWARE PROOF] State Quarter, the jump from Ungraded to MS66 is worth $156 (9.21×) — 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).