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Card number
#290
Year
1994
Parallel / variant
Electric Diamond

Don Mattingly prices by grade

GradeValueeBay
Ungraded$1.70Buy on eBay ↗
PSA 8$16.24Buy on eBay ↗
PSA 9$28.49Buy on eBay ↗
Grade 9.5$35.44Buy on eBay ↗
PSA 10$50.03Buy on eBay ↗
BGS 10$65.00Buy on eBay ↗
CGC 10$30.00Buy on eBay ↗
SGC 10$30.00Buy on eBay ↗

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1994 Upper Deck Don Mattingly Electric Diamond #290 value & prices

The 1994 Upper Deck Don Mattingly Electric Diamond #290 is a Baseball card (Electric Diamond parallel) released in 1994. Ungraded copies carry a market value of about $1.70.

An ungraded copy is worth around $1.70, a PSA 9 around $28.49, a PSA 10 (Gem Mint) around $50.03 and a pristine BGS 10 around $65.00. That's roughly a 29× 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 ($1.70) and top-graded ($50.03) 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.

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