I'd never heard of a break-up fee before. It makes sense, but it's a gesture of good faith that I honestly never would have expected to see in the business worl

I'd never heard of a break-up fee before. It makes sense, but it's a gesture of good faith that I honestly never would have expected to see in the business world. (This also makes sense in the context of a close-knit and trust-based community; I had just underestimated these properties of the startup world.) Does anyone have experience with a break up fee situation? And if it's not private, what were the amounts involved? It'd be nice to have a sense of scale.