If you are a paid member of U2.com you will be able to purchase these tickets in advance. A certain amount of the tickets (10%) on sale during the presale will be cheaper because U2 has been able to waive the Ticketmaster service charge. The charge usually is about $5-$10 depending on where the event is. This was mentioned in the U2 member e-mail which contained your ticketing code and a list of question and answers about the presale. After that 10% have been sold normal prices will apply, making tickets about $5-$10 higher than the face value of $49.50-165...