http://www.target.com/p/diablo-iii-reaper-of-souls-expansion-set-pc-game/-/A-15125814
http://www.amazon.com/Diablo-III-Reaper-Souls-Pc/dp/B00FENJVOE/
You can go to target if you want it today, or you can get from amazon.
I would like to get this for $20 myself, but don't want to wait till end...