Sometimes you find really great tools just by accident. Today was one of those days. Check out Zillow's amazing analysis tool for Oahu real estate.
This chart is interactive and you'll find it right below the first graphic on the page. Type Hawaii Kai in the right lower box, then submit. Information shown in the graphic above is for the median sales price of all residential properties. You can also select something different. Options allow for selecting the number of bedrooms, type (Single Family Residence, Condo, Duplex/Multi), or tier.