Feel for you trying to sell the at the moment mate, it seems that the Market is rubbish.
Looks like a very nice coupe, and in reality very cheap considering how much car it is. Think back 4 years and anyone looking for car for this amount of money and no way would you expect to be able to buy a car like this. I mean £13500 isn't really that much in car terms and this is a serious car. Just shows how poor current Market is that this hasn't sold yet, and there are plenty of other amazingly good cars for sale on this forum for too little money (eg playa's old M).
Anyway good luck mate, someone somewhere will be in the Market and then it'll get snapped up. If I come across anyone I'll direct them here