One thing some collectors are into is pocket schedules. However, I noticed that they were pretty tough to come by. I kept my eye open for myself and another collector who is also interested in schedules, but only came home with two:
I keep my tickets as souvenirs, mounting them on a sheet of paper with the box score from the game. I'm not sure I'll have a good translation of the names, so I'll probably leave the box score in Hangul.
Do you collect schedules or tickets? What do you do with them?