It's Garry Shandling's Show - "Foul Ball" (season 1, episode 4), original airdate 10/1/86, has a couple of interesting scenes.
At the top of the show, Garry talks about looking forward to going to a ballgame. To get in the mood he shows the audience his baseball card collection, and during the opening credits they show closeups of some of the cards. (2:11 in the linked video)
Later, there's a scene where Garry and his neighbor's son are looking over their cards. Garry offers the kid a Mickey Mantle, a Roger Maris,
and $10 for a Dwight Gooden card. ("It cost me a lot, but Dwight Gooden is really a rare card.") (13:51)
https://www.dailymotion.com/video/x7qrz9n