Pre-order GTA V and Get $20 Xbox Live Credit
From GTA BOOM Wiki
If you still haven't pre-ordered GTA 5 and own a Xbox 360, here's your chance to score a pretty sweet deal (and the Atomic Blimp pre-order bonus vehicle of course).
If you order right now via the Microsoft Store you'll also get yourself a total of 1,600 MS Points. With Microsoft recently starting to convert everyone's points into local currency, this is effectively the same as receiving a $20 credit for the Xbox Live Marketplace — definitely nothing to sneeze at when the game is only costing you $59.99.
Check the deal out here and remember — there will definitely be some DLC for GTA V eventually. It will be nice to have some points/Xbox Live credit ready and waiting for when it drops.