I disagree actually Alex.... they can be bad if you go to Porsche. But not THAT bad. In my personal experience of running a Boxster for 9 years and 40k miles.. they can be SILLY cheap to run... mines still on original clutch and brake discs!!!

and I've driven like a CNUT for most of those miles!
AND if you use Jasmine motorsport, or some of the US sites, Porsche parts are VERY cheap... you should see some of the results me and Polly x have got.. MENTALLY cheap!
However... I wouldn't buy a £6k Boxster!!! surely its gonna be a million mile old dog?!? and I agree with Alex here that you could get caught out with a huge repair bill!