1990 Score Mariano Duncan #506

1990 Score Mariano Duncan #506 value & prices

The 1990 Score Mariano Duncan #506 is a Baseball card released in 1990. Ungraded copies carry a market value of about $0.24.

An ungraded copy is worth around $0.24, a PSA 10 (Gem Mint) around $34.00 and a pristine BGS 10 around $44.00. That's roughly a 142× 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?

The spread between raw ($0.24) and top-graded ($34.00) copies is fairly tight, so grading this card only makes financial sense for truly flawless copies — or for collectors who simply prefer slabbed cards for protection and display.