Just to re-assure you a little, I have a mid 2007 1.9jtdm that has just turned 62K miles. I have had it for 5 weeks now and it has been a very pleasurable experience.
I have the 16 inch wheels, so tyre wear is fine, although will be looking for some larger wheels soon, just to finish the looks off!
The interior is holding up extremely well, no rattle or bits dropping off etc. Am very chuffed in this dept.
Engine wise it seems to pull well, not the greatest mpg, but still ok.
My engine has obviously been "driven" reasonably hard for the past two years, 30K a year must be mainly motorway speeds. There are no flat spots, has good grunt and doesn't sound too much like a bucket of bolts being shaken around.
All in all I love it. Stereo with Blue and Me is great.
All the electrics work and bodywork is in tip top condition.
So buy one!!!
Hope a positive report helps.
Mind you, saying all these positive things, you know that I will end up in a lay-by on the way home, steam coming out of the rad, oil pouring from the engine........
Will still look great though!