I think its all about getting the right car. I bought mine (an 08) for a little over £7k in March, but have spent quite a bit on it since then to bring it up to scratch. So long as you put some thought into your purchase, or at least budget to get it looked at/serviced by a specialist after purchase, you should be fine. Plenty of good advice to be had on this forum!
The most expensive thing I did was get the Cam/waterbelt replaced pretty much as quickly as I could after I bought mine (it was coming up to 50k miles), plus new MAP and MAF sensors and have had the front suspension (upper and lower arms, both sides) replaced as well.
On the other hand, after all that work, its an absolute joy to drive. Fantastic handling and grip, great torque and acceleration (had it mapped). The 5 cylinder 2.4 engine has a really gorgeous note when you push on the accelerator - not like any diesel I've driven before. It's well built, comfortable seats, and its just a great place to simply be as a driver. It has loads of room (at least for what I need) and is plenty economical enough (I get over 40mpg currently). Plus it is (to my eye) easily the best looking car on the road
. Certainly the best car I have ever owned, and not far off the best I have yet driven. I've had mine for 5 months and am always finding excuses just to go drive it
But for an alternative view, you may want to check some of the other threads on here - some posters have had some real problems; look up some of Shadowamd's posts for example. They can have problems with the DPF and EGR, as well as other problems. They are also said to eat tyres if not set up correctly, and suffer from "soft" paint, especially the red.