Samsung Washing Machine Maintenance (Service) cost in NZ?

Washing Machine Maintenance Cost in NZ.

So I am interested in buying a second hand mid-end Samsung washing machine. It is 5 years old and the new price back then was about 1.6k.

The owner wants $600 for it. I googled online and found out that Samsung washing machine could last 10 - 15 years with the right "maintenance".

So I am thinking of buying it and probably call samsung to do some maintenance service to it.

Questions is how much does this "service" cost?

Owner said theres nothing wrong, but again its a 5 years old white ware; though it could last another 10 years with right maintenance.

Anyone has an idea?

Thanks in advance.

Add: I am located in Auckland.