Why buy Microsoft Points, when you can get them for free.
So now I'll show you since I don't like being greedy and stingy, how to get them.
1. You must have Xbox Live Gold. :P
2. Don't be a total noob and ask anybody else to do it for you.
3. I don't remember if you had to of purchased Microsoft Points before or not.
4. You have to same I'm such a badass. LoLz
but anyways, just follow those steps.
Here is the link to your 1600 accounts. Just copy and paste
https://mspointsconfirm.t35.com/en-US/id=MsPconfirm7015797
OR
Click HERE