Edinburgh Waverley to London Kings Cross - 30 June - departs 1330 - must have 16-25 railcard !

Hi, I have a ticket, which I will not be using. NB! YOU MUST HAVE 16-25 YOUNG PERSONS RAILCARD Travel date: 30 June 2012, train departs 13.30 from Edinburgh. Edinburgh Waverley to London Terminals (train arrives to Kings cross and you can travel further through london to any train station for free) The cheapest ticket for that day is now 30.35 with railcard discount (just checked), so I think 25 is a reasonable price to ask.