You can get a car that runs for around €3000 in Bergen or Oslo, but used cars get progressively more expensive the further north you go. But getting work done on a car is the expensive thing. I payed around €5000 for my car 3 years ago and last year I spent €3000 getting it passed the control. The problem is that Norway has a harsh coastal climate (salt spray, constantly going above and below freezing etc), and shit roads outside of Oslo. I've broken 2 springs, cracked my oil sump, and punctured a tyre just because of shitty roads. And because Norway is outside the EU we pay toll on everything we order from outside Norway, which is most things (including car parts) because Norway doesn't actually produce anything).