Skype was purchased by Microsoft for $8.5 billion.
(The popular VoIP platform was first launched in 2003, has been purchased by Microsoft for $8.5 billion. It was bought by EBay in 2005 for around $3bn, and in 2009 they sold the majority of the company for about $2bn (£1.2bn), keeping a 35% stake in the firm. What I want to know, is why they didn't sell it on EBay.)