The 1988 Topps Don Mattingly AL #300 is valued at $63.49 raw, $321 in PSA 9 as of October 9, 2026. Its market value has held steady over the last 30 days, moving -0.1% to $63.49. Across the 54 days we have tracked it, it has ranged from $63.49 to $63.62. With 4 recorded sales, it ranks #329 of 354 baseball cards we track by trading volume.
About $63.49 raw, $321 in PSA 9, based on our market values as of October 9, 2026. Its market value has held steady over the last 30 days, moving -0.1% to $63.49.