JB Hi-Fi in Bendigo has the StarCraft II Battle Chest (first 2 campaigns) for $14. It may be old stock, as they are selling each individual campaign for $19.
The Battle Chest is not listed on their website, but was with their PC games in store.
Contents Includes: StarCraft II Wings of Liberty, StarCraft II Heart of the Swarm Expansion, and the StarCraft II Brady Strategy Guide
Currently $19.95 USD at Amazon.com where it is rated #1 in the "Linux Games" category (have fun with Wine!).
Still a gear game …..Own a copy and you can host another PC as a guest if you have visitors and they want to battle each other . My 9 year loves being zerg .