Ungraded vs MS66 2017 S [PROOF] Kennedy Half Dollar: price difference
2017 S [PROOF] Kennedy Half Dollar value — Ungraded $15 vs MS66 $36. MS66 sells for 2.4× Ungraded (+140%). Prices updated July 2026.
Medians of real sold listings per grade, updated July 2026 — how we compute values.
Ungraded vs MS66
$15→$36
MS66 sells for 2.4× (+140%) the Ungraded price — a $21 difference per coin.
Should you get this coin graded?
Grading runs about $30 per coin all-in. On 2017 S [PROOF] Kennedy Half Dollar, the jump from Ungraded to MS66 is worth $21 (2.4×) — at today's prices that doesn't cover the fee — grading this one is for the collection, not the flip. 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).