It's a small country and not that many places where boats are moored. Auckland
is the best. There is a popular marina at Tauranga - south of Auckland - not a quick trip. There are also boats in the Bay of Islands and Whangarei - both north of Auckland. Whangarei has a couple near or in town, and one new one farther south just in from Whangarei Bay. Bay of Islands has a couple of marinas
but fairly close. There are marinas
in Wellington too, south of Auckland a ways. I think these are the main spots on the north island.
On the south island, there is a marina at Norman (long ferry
ride from Wellington). There are other marinas south of Norman but I don't have much experience with those. Marinas in/near Auckland are spread all over the place.
Except for Auckland, none of the other areas have as large a population of boats as you might think. I's recommend chatting with some of the brokers in NZ too. Our boat was bought by a couple from Australia
who flew over just to see her, came back to survey
and sea trial, and then sailed her to Brisbane
. From what I saw out there, Australia
has more boats for sale
from cruisers who end their journeys there - middle/end of spring is when the boats come in. Many boats are sold there.
Also, boats offered in NZ and Oz tend to be very pricy compared to other places but you may want to sail out of there. The waters are rough around NZ though, so most just go to and from there around the cyclone season.
I am sure there are more knowledgeable sailors out there with more current
and accurate info though.