Has any ever heard of a secondary markets for private company stock? If so, can you share a little bit? I just recently heard about this while reading an article on how some executive at Facebook has sold some of their shares.

I did a little research and found a few brokers that have - it seems from what I read - created a fund - similar to a VC fund - but with private stock - not money - then I get lost.

It was always my understanding that under Rule 144A - you could only sell privately held stock to acredited investors with over $100 million in assets.

Does any know any more?