V festival 2012 ticket, Chelmsford, full weekend yellow camp with return coach ?

One ticket for the V-festival in Chelmsford, yellow camp (17.08.12-20.08.12) The ticket includes coach travel both ways, from London Victoria coach station to the v-festival coach park. Face value of the ticket was 210, but I am now unavailable to go so I would like to be able to sell it on. Cash payment is preferred. Ticket and transfer authorisation can either be collected or I can deliver it to you.