You know Silicon Valley real estate prices are bad when you start looking at private islands for sale that are more affordable than anything in the local papers. This one acre island in New Jersey includes a 3 bedroom, 2 full bath house. Asking price is $599,900. And they throw in four boats and two boathouses. Of course the realities of owning your own island probably are not as romantic as the dream. And the desirable tropical islands are pricier. But it’s got to be a better investment than the overpriced cottages going for bundles in this area.