I tried to look up the Skype acquisition since this seemed crazy and this is what Wikipedia says:

"In September 2005, eBay acquired Skype for $2.6 billion.[13]

In September 2009,[14] Silver Lake, Andreessen Horowitz and the Canada Pension Plan Investment Board announced the acquisition of 65% of Skype for $1.9 billion from eBay, which attributed to the enterprise a market value of $2.92 billion. Microsoft bought Skype in May 2011 for $8.5 billion."

Looks like Ebay paid 2.6B for Skype, then got 1.9B for 65% of it and presumably another 2.8B for the remaining 35% once Microsoft acquired it. Doesn't sound like such a bad acquisition.