Best Buy offers the World of Warcraft 60-Day Prepaid Game Cards for Windows or Mac for $29.99. Add three to your cart and they fall to $59.98. Shipping adds $8.97, or opt for free in-store pickup. Even with shipping, that’s $11.49 per month and the lowest total price we could find for this quantity by $21. Sales tax is added where applicable. These cards provide a total of 180 days of play time.