Just sold my 1 year old 5s 32GB for $850 last month so $559 for a Refurbished 16GB model with 1 year warranty seems like a pretty good deal especially with Apple's recent price hike due to the weakening dollar.
Only the Space Grey variant is available for this price. Gold and Silver options are available for $660.
Free store pickup available else delivery is via NZ Couriers and postage costs are as follows:
$0.00 - Pickup from Retail Store
$5.99 - Packaging & Delivery - Auckland by NZ Couriers, takes 1-3 days (Usually Overnight)
$9.00 - Packaging & Delivery - North Island by NZ Couriers, takes 1-3 days (Usually Overnight)
$10.99 - Packaging & Delivery - South Island by NZ Couriers, takes 1-3 days (Usually Overnight)
The only con I could find is the 1 year warranty is carried by Expert InfoTech themselves and not Apple.