1991 Topps Mark McGwire #270 (Error)
Oakland Athletics · Error: his 1987 slugging percentage is printed "618" with no decimal point. See the corrected version too
Other versions of this card: Corrected ($1–$2 raw)
Raw (ungraded)$1–$2
PSA 8Pending
PSA 9Pending
PSA 10Pending
Values collected by hand from recent sales, Nov 2026. Grades marked Pending have not been collected yet.
Raw vs. graded
Bars show the estimated price range for each grade on a log scale. Pending means that grade has not been collected yet.
Raw$1–$2
PSA 9Pending
PSA 10Pending
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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.