Kon Knueppel cards · Card value
#12 of 12 on our ranking of the most valuable Kon Knueppel cards.
A dual-signed one-of-one college autograph pairing Knueppel with Duke teammate Cooper Flagg, issued while both were still at Duke. Graded PSA 10, it sold for $10,800 in August 2025, ahead of either player's NBA debut.