Buying X5 3.0D Sport

[X5H]

Hi,

New to the forum and looking to purchase a 2004 BMW X5 3.0 Sport.

It has the following spec

Reg Date: 16/06/2004
Colour: Titanium Silver
Upholstery: Dakota Grey Leather
Mileage: 51000
Owners: 1

Star spoke alloys
Cop Relative
6 speed Auto gearbox
sport seats
seat heating
park distance control
Bi-Xenons lights
Auto air conditioning
Tv
Bluetooth phone prep
Sun protector glass
white indicator lenses
Lumbar support
Headlight wash
rain sensor
Adaptive headlights
Auxiliary heating with remote
Satnav
CD Changer
Anthracite headlining
self levelling rear axle
sport steering wheel
Thatcham 1 alarm
climate comform windscreen
panoramic sunroof
folding mirrors
Elec front seats with memory
sport suspension
running boards aluminium
roof rails black
multifunction controls
airbags rear side
dynamic package

Whats it worth and what do I need to look out for?

Any help greatly appreciated

Thanks in advance