For those of you guys traveling in Australia, I can recommend this girl:
http://viviennebabe795.com/home.html
She is usually traveling around the country and I saw her twice and she is the best value for money in the country - or close to it (of course can't compare to HK). She has a good body and good skills and she seems to enjoy her time. If I remember well it is about 200$ for 30 min so again not cheap - but better that most around in Australia.