1990 Upper Deck Baseball Factory Sealed Set

the 1991 Upper Deck Baseball set is a classic from the early ’90s and is widely regarded as one of the cleanest, best-photographed mainstream sets of the era. It was Upper Deck’s third baseball release, and by this point the company had set the gold standard for premium-quality cards.

This set is best known for its Michael Jordan “SP1” card, one of the most famous non-baseball cards ever inserted into a baseball product.