How much money was the company bought for?
Microsoft acquired Mojang for a smooth 2.5 BILLION dollars.
– Mojang blog post

I love you. All of you. Thank you for turning Minecraft into what it has become, but there are too many of you, and I can’t be responsible for something this big. In one sense, it belongs to Microsoft now. In a much bigger sense, it’s belonged to all of you for a long time, and that will never change.

It’s not about the money. It’s about my sanity.
– Notch, on his personal website

Under the terms of the agreement, Microsoft will acquire Mojang for $2.5 billion. Microsoft expects the acquisition to be break-even in FY15 on a GAAP basis. Subject to customary closing conditions and any regulatory review, the acquisition is expected to close in late 2014.
– Microsoft Press Release