I notice the coupon says in store purchase only and not on Bestbuy.com. I guess it's worth a try.
I got one for $2.50 on eBay actually. Is it able to be used online or no? It says in store only.
You need to buy one on ebay that specifically says online code. Here is a link. I would be shocked if you can find an online code for less than this
http://www.ebay.com/itm/Best-Buy-10...580131?hash=item3ab6c6b9a3:g:UwQAAOSweuxWS19e