Ungraded vs PSA 10 Bob Porterfield #248 1956 Topps Baseball: price difference
Bob Porterfield #248 1956 Topps Baseball value — Ungraded $5 vs PSA 10 $5002. PSA 10 sells for 1,000.4× Ungraded (+99940%). Prices updated July 2026.
Medians of real sold listings per grade, updated July 2026 — how we compute values.
PSA 10 sells for 1,000.4× (+99940%) the Ungraded price — a $4,997 difference per card.
PSA 10 sells for 32.69× (+3169%) the Grade 9 price — a $4,849 difference per card.
Should you get this card graded?
Grading runs about $30 per card all-in. On Bob Porterfield #248 1956 Topps Baseball, the jump from Ungraded to PSA 10 is worth $4,997 (1,000.4×) — 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).