Ungraded vs PSA 10 Terry Harmon #642 1974 Topps Baseball: price difference
Terry Harmon #642 1974 Topps Baseball value — Ungraded $2 vs PSA 10 $374. PSA 10 sells for 187× Ungraded (+18600%). Prices updated June 2026.
Medians of real sold listings per grade, updated June 2026 — how we compute values.
PSA 10 sells for 187× (+18600%) the Ungraded price — a $372 difference per card.
Grade 9 sells for 14× (+1300%) the Ungraded price — a $26 difference per card.
Should you get this card graded?
Grading runs about $30 per card all-in. On Terry Harmon #642 1974 Topps Baseball, the jump from Ungraded to PSA 10 is worth $372 (187×) — 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).