train tickets Edinburgh to Kyle of Lochalsh March 2012 ?

I have a return journey (2 singles) booked from Edinburgh to Kyle of Lochalsh 10th March - 17th March. Unfortunately, i have had to delay my trip. The tickets are the cheapest available - Advance singles and are therefore non-refundable by ScotRail. I bought the journey as 2 single tickets costing £15.10 each. So, on 10th March, the journey is as follows: 9.35am Edinburgh - Kyle of Lochalsh 3.59pm with changes at Perth and Inverness. Saturday 17th March 12:03 Kyle of Lochalsh - Edinburgh 6.25pm again with changes at Inverness and Perth. I can either sell them as a return for £30 (preferable) or as single journeys £15 each. contact Emma on 07764488339 if you are interested buyer collects