Ungraded vs PSA 10 Bob Robertson #664 1970 Topps Baseball: price difference
Bob Robertson #664 1970 Topps Baseball value — Ungraded $4 vs PSA 10 $510. PSA 10 sells for 127.5× Ungraded (+12650%). Prices updated June 2026.
Medians of real sold listings per grade, updated June 2026 — how we compute values.
PSA 10 sells for 127.5× (+12650%) the Ungraded price — a $506 difference per card.
Grade 9 sells for 14.75× (+1375%) the Ungraded price — a $55 difference per card.
Should you get this card graded?
Grading runs about $30 per card all-in. On Bob Robertson #664 1970 Topps Baseball, the jump from Ungraded to PSA 10 is worth $506 (127.5×) — 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).