Well you are selling the account which is almost certainly in direct violation of EA's terms of service.  I'm not really that interested in the game either but will pick it up if I can get at a great price.  I can get the limited edition retail currently as low as $22

https://www.google.com/products/catalog?q=battlefield+3+limited+edition+pc&um=1&ie=UTF-8&tbm=shop&cid=17895740740237267378&sa=X&ei=DfXcT_-XIqT46QG4iNDBCw&ved=0CGkQxBUwAA

Used I can get it at $12.50

http://www.dealscube.com/detail.asp?id=13607&n=Battlefield-3-Limited-Edition-Video-Game-for-Windows-PC

Not to mention the occasional 33% of 50% off retail sales that EA sometimes puts out.

For an origin account that could be shut down anytime, you'd have to beat those prices considerably to make it attractive.