So is it a private sale..as Aylesbury has one of the biggest Ducati dealers in the Country, OnYerBike (
www.onyerbike.net).
I would be willing to pop over to OYB/Aylesbury on Sat if you want. Its a nice ride over that way from Oxford anyhow...whatever you do, pop into OYB anyway and it will give you a better idea of price, and what you can get for your money.
If you want to meet up, and a second opinion, let me know.