Those are US prices. Australian prices are much higher. And as you cannot store fresh tomatoes, importing them is costly so that prices vary a lot. As said in a

Those are US prices. Australian prices are much higher. And as you cannot store fresh tomatoes, importing them is costly so that prices vary a lot. As said in another comment, they'll sell them at CostCo for A$7 per kilo, which seems to be a competitive price in Australia.