Just to clarify a previous poster's comments about non-transferable tickets:
When tickets are bought through legitimate ticket agencies, any purchasers suspected of being ticket touts are told to collect their tickets from the box office. They can only do this if they present themselves, in person, and sign for the tickets using the credit card with which they purchased the tickets.
This also applies to any bona fide purchaser who buys tickets and requests box office collection - usually because the show is less than a week away and there is not time to mail them out.
Tickets purchased over the phone or via the internet using a debit/credit card may not be collected by a third party. This is a general rule and all theatres enforce this rule. It helps to protect the consumer against credit card fraud and deters potential ticket touts.
It is illegal to sell theatre and concert tickets for more than their face value.