Caprigreen, no disrespect to your car, but the pricing information is easily available.
I can't understand their spread between px and private sale, it is huge!
As a cash buyer I would not expect to pay more than £500 over the px price.
Maybe I am mistaken, but as stated, so many buyers have their own px or require finance that a liquid private buyer should be in a reasonable position and the seller improves on their px.