It was another milestone year for the still-growing sports card world, as collectors in 2025 sharpened their interests in all-time greats such as Michael Jordan and Kobe Bryant, and Shohei Ohtani.

Heritage’s director of sports auctions Chris Ivy has said the marketplace typically leans to a more conservative estimate for a consigned item. The “conservative” estimate the one-of-a-kind 2007-08 ...