Demand for Sales Representatives in Australia
To check whether Sales Representative is a skill in Demand across Australia you can review the State Sponsorship List of various Australian States/Territories:
Australian Capital Territory http://www.business.act.gov.au/skilled_and_business_migration
New South Wales http://www.business.nsw.gov.au/live-and-work-in-nsw/visa-and-migration
Northern Territory http://www.migration.nt.gov.au/
Queensland http://www.workliveplay.qld.gov.au
South Australia https://www.migration.sa.gov.au/
Tasmania http://www.migration.tas.gov.au/
Victoria http://www.liveinvictoria.vic.gov.au
Western Australia http://www.migration.wa.gov.au
The State Sponsorship List is updated regularly so you need to review each of the related migration websites for latest updates.
Also review the New skilled occupation list Australia July, 2013 – 2014 to see if Sales Representative exists in the List.