Not sure on the NZ exchange rate but check out these ones on eBay.
I live in NZ and am new to CNC. Building my first machine and been looking at these linear bearings with pillow blocks
My question is will these be ok for the rails?
I can't find anythink cheaper unless I make my own using skate bearings.
The price is pretty good - it'd be hard to land them in NZ any cheaper! Whether they would be appropriate for your machine would of course depend on what you're building, but if the other option is skate bearings, those would likely be a better choice.
What type of machine are you building?
I have a pile of surplus THK and IKO profile rail linear bearings if you wanted something nearer the top of the linear bearing food chain Admittedly a little dearer, but not much.