There are a couple sellers on Yahoo Japan Auctions who tend to list player lots. I don't know what inspires them to do this so often; I'm sure making actual sets is impossible with whatever inventory they have, but perhaps the cards come from card shops clearing out their old stock. I've bought a few of these lots in the last few years, most notably grabbing a Ken Griffey Jr. lot with some seemingly overlooked rarer inserts I needed.
The Kerry Wood lot below had a couple welcome surprises, too. All the cards - almost five dozen - are pictured below without much commentary, until the end. So, until you reach the bottom, enjoy the gallery.
one of my recent posts, you might recognize the Yankees card as being from the Kanebo MLB Gum/pin set. The All-Star Game card also came from that release, so this lot put me two cards closer to building that set.
But three little cards weren't worth the price of the lot. This card made me pull the trigger: