Grade 9 vs PSA 10 Chesnaught [Inverted Back Error] #12: price difference
Chesnaught [Inverted Back Error] #12 value — Grade 9 $100 vs PSA 10 $9999. PSA 10 sells for 99.99× Grade 9 (+9899%). Prices updated July 2026.
Medians of real sold listings per grade, updated July 2026 — how we compute values.
Grade 9 vs PSA 10
$100→$9999
PSA 10 sells for 99.99× (+9899%) the Grade 9 price — a $9,899 difference per card.
Should you get this card graded?
Grading runs about $30 per card all-in. On Chesnaught [Inverted Back Error] #12, the jump from Grade 9 to PSA 10 is worth $9,899 (99.99×) — 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).