You can buy an SoR account from someone for 15$ (or 10 if they're having discounts or just lower prices) Choose a character to get your free level 80. Since this account is practically being introduced into Bnet for the first time you can choose the account name. So you can transfer the character to your main account for another 30$.
In the end. It's a lot cheaper, if you don't want to transfer the character at all to another account, or wish to make a new account. You can saved even more $ by just keeping the SoR account.
Buying an SoR account 5-10minutes (5-10$)
Getting SoR 30minutes (0.00$)
Activating/selecting character for 1-80 10-30minutes (if you're picky) (0.00$)
Transferring character to another account/server 1-20hours (25$)
Total Maximum Price: 39$
Even though others will claim they came up with this method. I figured it out on my own. Enjoy!(You can't be banned by this exploit/method..)