You might find a decent deal at Bestbuy or Gamestop every now and again but for the best lowest price right now you can never go wrong with the Blizzard store at $48.00. http://www.blizzardstore.com/store/d...l?id=110000044

I have never done the battlechest as a digital upgrade but I did do 3 of my WoTLK and BC via the digital upgrade.