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A bustle of butter-buying at Auckland's Costco - where it costs $10 a kilo.
Stats NZ figures show the price of a block of butter has soared 65 percent in the past year.
Videos on social media show shoppers piling boxes of the spread into carts at the bulk-buy supermarket.
Former Costco managing director, Patrick Noone, says the store's very unlikely to try to stop bulk buying.
He explained they did it once when eggs were short - but if they can supply it, they'll let people buy as much as they can.
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