This is exactly what I'm talking about. I know quite a lot of idea guys, and some that have been successful. And your bra-story is a good example.

The reason that I didn't want to include prototypes is that if you have one you're not selling the idea, but a lot of work. Often years of it.

I had an office at an incubator once, and every now and then there would be a story in the paper about someone from the incubator selling an idea and a prototype for a substantial amount. But knowing the people behind it I knew that they were selling years of work, not merely an idea. The bra-lady sounds like she is in the same category.