The cheapest windscreen wiper refills in Supercheap Auto are $10 a pair, with many $20 a pair. That seems pretty expensive for a bit of shaped rubber. You can get wiper blade refills at AliExpress for about NZ$5.50, though they seem to want you to take the metal out of your current blade and put it into the new one. Not a huge saving, but I prefer to change my wiper blades regularly, every 6-12 months, as they seem to work better that way.
Has anyone tried the cheaper refills? Obviously I don't want to put anything unsafe on the car, because wipers are a safety item, but I don't see why we pay so much for them in NZ.