Complex sentence: Tickets to the 2006 festival went on sale at 9am on Monday 15 May 2006--all camping tickets sold out within three hours, and all general admission tickets sold out after 48 hours.
Split into simpler sentences: Tickets to the 2006 festival went on sale at 9AM on Monday 15 May 2006. All camping tickets to the weekend event sold out within three hours, and all general admission tickets sold out after 48 hours.