Bus tickets is usually acquired within the ticket windows at Gyeongbu station in Seoul or Central Bus Station in Busan proper up to your last second, based on seat availability. In case you?�re intending to journey at a occupied time, it?�s best to secure a ticket a few days beforehand. https://garrett6w753.theideasblog.com/33767882/best-place-in-busan-an-overview