In need of a car to get to tramps

I am after an old reliable car (for tramping) with buy-back options (I am a careful female driver). I will leave Melbourne late January and arrive in Auckland at the beginning of Febuary and travel from North to South. Tramping in South Island is in question (been there a couple of times). I very much look forward to your contacts offering the special, tips... related to this request and can be contacted via dzungn@melbpc.org.au