What does “best available” mean? The O2 05 March 2015 17:40 Updated Follow It means these tickets are thought to be the best available at that time of booking. They’re sold first come, first served. Related articles Do you have a seating plan for The O2 arena? I bought tickets in a pre-sale and now better ones are available. Can I swap them? What is a Ticketless (credit card entry) event? Can I up-grade my ticket? Who are registered ticket agents? Comments 0 comments Article is closed for comments.