The product is a rare collectible: Bo Knows Bo Trio trading card set from 1988 Topps, 1989 Topps, and 1994 Score. This set is highlighted by a unique 1988 Topps error card #750, 'S' on Topps logo runs across 'P", white coloration on 'A' in Royals, and varied blemishes in Bo's Royals jersey.