Ungraded vs PSA 10 Ron Guidry #656 1977 Topps Baseball: price difference
Ron Guidry #656 1977 Topps Baseball value — Ungraded $3 vs PSA 10 $279. PSA 10 sells for 93× Ungraded (+9200%). Prices updated July 2026.
Medians of real sold listings per grade, updated July 2026 — how we compute values.
PSA 10 sells for 93× (+9200%) the Ungraded price — a $276 difference per card.
Grade 9 sells for 39.33× (+3833%) the Ungraded price — a $115 difference per card.
Should you get this card graded?
Grading runs about $30 per card all-in. On Ron Guidry #656 1977 Topps Baseball, the jump from Ungraded to PSA 10 is worth $276 (93×) — 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).