Cheapest I've seen it for the boxed media. Three copies at Target Wetherill Pk (Stocklands). Not sure if its across stores.
Already have it? Then gift it to a friend or relative to play online. That's what did for my son and nephew, they now talk (strategically) much more between Sydney & Brisbane playing online than they did sitting beside eachother on a lounge playing their portable devices.
Thanks for the hook-up. Didn't really feel like paying $60 USD on steam (still have to download though, no disc drive in my PC). Grabbed a copy at Albury target. Wasn't on the shelf but I asked at the electronics counter and he had a few there. He also offered me Ghosts but I already have that. Don't be afraid to ask!