not sure if this is a music forum question. ah well...

if a ticket has a face value of, ooh say, £13.50... if the gig isn't sold out and i go upto the box office on the night of the gig, will a ticket cost me £13.50?

or will they up it/still charge handling fees, etc.?

(ps. it's for !!! at Shepherds Bush Empire on Thursday)