A view down Broadway in SoHo, Manhattan. Living in New York City has some perks, but it'll cost you. The average rent for a one-bedroom apartment is $3,680 a month. And don't forget the 15% broker fee – on a typical one-bed, that'll set you back $6,624. "When you add that broker fee on top of all of your housing costs, it's a lot. It really is a tax on moving. It's a tax on your freedom to live in places that you want to." That's why two Google employees quit their jobs to launch a start-up that makes moving, and renting, cheaper. Their story, on CNBC.com.