Judging what NZ RRP should be based on the cost of importing individual units is a flawed method to start with, the shipping costs per unit would be reduced to fractions of that for us to individually import.
I agreed it is flawed but whilst shipping costs per unit would come down to a few dollars instead of $50, buy individually shipping we are getting away with the 15% GST when under $400, which would amount to $60 which is ten more dollars than the shipping cost.