How many copies of Minecraft have been sold?

Millions.

PC/Mac version
22,876,237 people have bought the game.
In the last 24 hours, 7,396 people bought the game.

There doesn't seem to be a counter including console versions

12 million- XB360
21 million- Pocket Edition
1 million- PS3

As of April 4, 2014

I don't even Probably like 12 mil