Here's a great (and green) idea

Mannequin Madness in Oakland, California sells and rents used mannequins.

Their business strategy seems sound, following Porter's generic business strategy of cost leadership. Mix in a green and fun brand, and you get a great business. Plus, you get to hang out in an office full of co-workers like this:

I added the bikinis using The Gimp. Hey, this is a family-oriented blog (most of the time).