It cost Google between $10-million and $25-million to buy SocialDeck a small Canadian game-apps maker. How much it costed for Zenimax to aquire the legendary Id software ?
http://venturebeat.com/2009/07/07/zenimax-borrowed-105-milli...
I'd expect it to be a lot more than that. $25 million is a typical budget for a single AAA console title these days. Not only did Zenimax buy id's game development experience they also bought their tech, which is probably worth that on its own. Mind you, id were badly in need of a publisher at the time.