1990 Fleer Don Mattingly / Mark McGwire #638
New York Yankees / Oakland Athletics · SuperStar Specials subset: "A.L. All-Stars"
Raw (ungraded)$1–$2
PSA 8$5–$10
PSA 9$10–$15
PSA 10$30–$40
Values collected by hand from recent sales, Oct 2026.
On eBay now
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Is it worth grading?
Grading costs more than most raw junk wax cards sell for. Only consider it if the card is sharp: centered, four clean corners, no print lines or wax stains. Check the PSA 10 vs raw gap above once values are in.