Final Fantasy XIII has sold 5.55 Million Copies
As of May 18th. Which means it outsold XII. It also sold faster than any previous FF game.
Link
And yes, I know "Blah blah sales don't make the game blah blah this doesn't change the fact it's crap blah blah people are idiots blah", but I'm happy to see that despite all the complaining about it it's proved successful. I know I had fun with it and would love to see more games like it. :D
That was already mentioned last week
on another thread...
I don't think the sales figures prove the game was successful by any means.
My saying so doesn't have anything to do with the quality of the game.
I believe the fans will buy any numbered FF game.:roll2