Diablo – Can you cash out a battle.net balance

You would have to change your "COUNTRY OF RESIDENCE" option on battle.net unfortunately it can only be done if you contact blizzard support and make up some good story why you need it to be changed.Note that doing this could cause you bunch of new problems.

Other thing you could do is order retail copy online from Amazon or any other sites if you manage to find it cheaper,most of the sites have a pre-order discount if you order before game release so you could pass even cheaper,the problem here is you will have to make sure that shipping & border control won't charge you sin you could end up paying even more.

Diablo 3 hasn't implemented it yet. But if you have Starcraft 2, go on that and browse your facebook friends, add them, and when they accept it will show up on your Diablo 3 friends list.