Do Australians generally make enough money compared to Americans to make that look like a decent price? How much do they pay for games in the UK? How much cheaper ar PC games in Australia & the UK compared to console games?
If the answer to the first question is "no," then is shipping a purchace from America or Canada cheaper? There's always buying used games, but the developers don't get a cent of that money.
Wait, I'm going to answer this myself.
Okey, Red Dead Redemption on Amazon.com.
UK: £24.99-£49.99 new. (AUD $40.37-$80.77).
AU: There is no Amazon.au

CA: CDN$ 59.83. (AUD $59.52).
AM: $39.99-$59.99. (AUD $40.48-$60.74).
http://www.game.com.au/search?search=red%20dead list the AU price as $68.00-$109.95.
(Is pissed that there is no PC release). Okey so yeah, you're paying more than people in the UK, so your country is getting the raw end of the deal.