Hi Chris, you have come out of the lurking shadows finally!
the car has potential for sure. but view and test drive with your eyes open. and make sure you get it up in the air.
At this price, i would expect it to be faultless really. Press every button, make sure absolutely everything works, including air con/ all heaters, central locking, all windows, sunroof, seat heaters.
i would ask for it to go on a lift to be able to do a full underside inspection. many problems start from underneath, out of sight.
low mileage doesn't always mean without faults and perfect condition. but its a good start.
also make sure you get some revs going on the test drive (long stretch of road required.
if the secondary fuel pump is failing (common fault), i think they only kick in at 2800rpm, then it will falter at these higher revs. low mileage car will have to have spend long periods without use, and thats exactly how the secondary fuel pumps fail (lack of use). if you dont do it yourself, to change a fuel pump, plus part, i reckon will set you back £500 at least at a garage.
listen for any knocking noises when driving.
lift the front carpets and underlay and feel the floor metal with your hand for any signs of damp or water.
check all along the bulkhead for any rot. common on late cars, and can lead to water ingress.
if you are not confident about inspecting the car, take a mechanic with you, or have it driven to a jag specialist for an inspection.
i think the car is near London is it??
try this placehttp://www.surreyjag.co.uk/
would have been nice to get a description of the cars condition on the advert dont you think?