BF3 = base game

BF3 premium = dlc

so u nid bf3 to play it online.premium is onli dlc in 1 price

u can play the the original bf3 map.
expansion is extra topping of ur game that improve ur gaming experience such as new map and weapons

u can play multiplayer for the original 9 maps
B2K and close quarter DLC offer extra 10 weapon and 4 map each

i buy my game from here
http://forum.lowyat.net/index.php?act=ST&f=180&t=1293544
it bf3 onli rm 100

juz use m2u to transfer for him or bank in to his account directly
go and pm him and ask how to make a payment