"Weve been forwarded one email conversation from a source, where Dagley asks if theyd be interested in buying shares of Facebook from current holder? Another person who was approached said the asking price was $3-$4 billion. A third source says the total amount of stock being sold is around $30 million."

"The seller was never disclosed, but its likely a current or ex-Facebook exec who wasnt required to sign special agreements with investors during the venture rounds. That likely means they can theoretically sell their stock once its vested and paid for."