You know when someone tells you, usually in a hushed, conspiratorial whisper, about some too-good-to-be-true deal and you think, ‘Yeah, sure, right. As if?’ That’s pretty much how it went when a friend recently tipped me off that the Niihau Apts. building on Beach Walk Ave. in Waikiki has fee simple condos listed for sale for less than $300,000. And pigs can fly and I own a unicorn, or at least that’s what was running through my mind as she told me. But, lo and behold, the Niihau does exist, and there are currently a couple active listings for units in the building, all for less than $300,000.