I will have a Windrush on the Auction Zillion in two weeks. It looks strong and has the good rudders etc and will have a reserve of about 1.5.
That would be in Auckland.
Windrush boats come up all of the time though so just keep putting it in the search on Trade me or Zillion.
If you are down Taranaki there is a foam PT that looks pretty good. He is asking 2K ONO. He has been selling for months (was over 3K I think) and might go to 1.5...oh, this is the second link boat! The blue boat is a dog compared and realistically worth $500/700 when being kind. The white boat has three spare sails, is on weight and was in the nationals last season (I was also considering this boat) : )

Do ask here for what to look for if you decide to buy any boat.