1966 Topps Roy McMillan #421

1966 Topps Roy McMillan #421 value & prices

The 1966 Topps Roy McMillan #421 is a Baseball card released in 1966. Ungraded copies carry a market value of about $2.90.

An ungraded copy is worth around $2.90, a PSA 9 around $147.50, a PSA 10 (Gem Mint) around $494.39 and a pristine BGS 10 around $643.00. That's roughly a 170× premium for a gem-mint copy over raw — one of the clearest signals that condition-sensitive buyers dominate this card's market.

Is it worth grading?

With raw copies near $2.90 and top grades reaching $494.39, grading a sharp copy of this card can clearly pay for itself — the spread comfortably covers a typical ~$25.00 grading fee. The catch: only submit copies with strong centering, clean corners, and unmarked surfaces, because anything below a 9 usually erases the math.