I've now reduced the price on Ebay and PH to £23,750......
I doubt that £250 is going to make a difference Si. Whatever happens, a potential buyer is going to make an offer below asking price. If you're keen to sell then I'd suggest you offer it at your rock-bottom price, state that it's not open to offers and do not budge on it.
FWIW I think your price is reasonable for a non-leather/LE car and what will be seen as relatively high mileage.