Hmm, ok, well you can buy them elsewhere too to save cash.

Amazon has them for $10.99
http://www.amazon.com/World-Warcraft-PC-Mac/dp/B00FRESQYG/ref=sr_1_1?ie=UTF8&qid=1411666041&sr=8-1
or £9.30 in the UK
http://www.amazon.co.uk/World-of-Warcraft-PC-DVD/dp/B00FAJUTD4/ref=sr_1_5?ie=UTF8&qid=1411666393&sr=8-5

If you feel like waiting