Ungraded vs PSA 10 Ron Guidry #500 1979 Topps Baseball: price difference
Ron Guidry #500 1979 Topps Baseball value — Ungraded $2 vs PSA 10 $326. PSA 10 sells for 163× Ungraded (+16200%). Prices updated June 2026.
Medians of real sold listings per grade, updated June 2026 — how we compute values.
PSA 10 sells for 163× (+16200%) the Ungraded price — a $324 difference per card.
Grade 9 sells for 28× (+2700%) the Ungraded price — a $54 difference per card.
Should you get this card graded?
Grading runs about $30 per card all-in. On Ron Guidry #500 1979 Topps Baseball, the jump from Ungraded to PSA 10 is worth $324 (163×) — 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).