1966 Topps Diego Segui #309

1966 Topps Diego Segui #309 value & prices

The 1966 Topps Diego Segui #309 is a Baseball card released in 1966. Ungraded copies carry a market value of about $1.93.

An ungraded copy is worth around $1.93, a PSA 9 around $135.00, a PSA 10 (Gem Mint) around $333.29 and a pristine BGS 10 around $433.00. That's roughly a 173× 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 $1.93 and top grades reaching $333.29, 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.