My tips for buying online
a. not ebay/gumtree - unsafe transaction
b. use a business with recommendations from others.
c. A site which uses SSL - https - creditcard secure
d. have a 100% guarantee
e. contact with them is not difficult. telephone number clearly visbile - email etc
After being skeptical i used http://www.sohotickets.com (friends recommendation) for the opening night in liverpool for oasis... as promised the tickets did arrive although standing can get a bit messy.... good luck