The trouble is when they do need parts they pricey. That said many years ago I bought a 8 year old Chrysler Neon for £1200. I ran it for about 5 years and the only things it needed was suspension arms and brake disks.
The VW 1.9tdi in it's 90 or 110 bhp forms are fairly indestructible. My Octavia is about to clock up 200,000 miles. It is however a thoroughly horrible car, it's basically a VW Golf that's been 'improved' by the accounts department.
Thats the problem with a lot of those VW/VW based vehicles - run of the mill passat, golf, octavia, etc. they'll run forever and eat up the miles for long runs but as a driving experience urgh not even sure how to describe it - I want to say mundane but that doesn't really convey it.