BB has the buy 2 get 1 free offer going and works with this.
Buy 2 60 day Wow Sub cards and get a 3rd free. A savings of about $18 from
their usual 6 month subscription.
Link: http://www.bestbuy.com/site/World of Warcraft Game Card - Mac/Windows/6957304.p?id=1099383090462&skuId=6957304