Simply the more land that is available for purchase, the cheaper it is. It's simple economics, according to Michael Griggs of Clark Realty Corporation on the Big Island Real Estate. “The reason Big Isle real estate prices, in general, are less than Kauai is supply,” Griggs told The Garden Island. So you should Buy the apartments In the Kona Condoz for sale. because it has the beautiful environment and has every facilities of life.