When i bought my Astravan it had just 13000 miles or so on the clock. I went for a petrol van as they are easier and cheaper to maintain over diesels.
I have been doing all my own servicing.
Its has all the brakes renewed, twice. Including the drums, disks and hyraulic lines
it had new suspension
its had new head gasket, water pump, valve seals, cam belt, and big end shells.
two new exausts
8 sets of tyres
i have now owned it for 8 years, it has 97k miles and is still going strong.