These were the exemptions where a second hand dealers licence is not required (from the QLD government website).  

Licence exemptions

Second-hand dealing

You do not need a second-hand dealer licence if you:

• sell weapons as a licensed weapons dealer
• hire out second-hand goods
• are a registered banking or life insurance company, trustee company, friendly society or building society
• are a registered charity
• are a community or religious organisation
• are a local government.

You don’t need a licence if you only sell:

• newspapers, books, pamphlets, periodicals or other printed publications
• stamps or coins
• goods or items that your customers returned to you for refund or exchange
• motor vehicle batteries
• used tyres
• collector's cards.