If you want buy it legitimately, go to Amazon.com right now and use the code SQRLUVOC to get 25% off digital downloads.
The only way to get it so cheap ($8) is to buy a Russian CD Key (from Russia), set up a VPN and activate and download the game from Origin. There's two big problems I have with this. First, your giving your Debit / Credit card info to a RUSSIAN website and secondly, there's the chance that the CD Key might not work.