buying a wow membership pin

i would like to know if i can buy a pin to play on my wow account
because i never bough the game i just downloaded the game off of the wow site so i have have been using a trail account and the trail account has ended today
and was wondering if i can just buy a pin instead of buying the game from a retailer i will be offering up to 10m cash on rs2

 

i got a WoW 60 day game card 15m would be good price

 

I added you on AIM I got one that is 30 days =D