Question

You must post within Australia only when using Fixed Price format Sellers with a feedback score of

翻译一下 急~
You must post within Australia only when using Fixed Price format
Sellers with a feedback score of less than 5 may only post within Australia when using the Fixed Price format. Therefore you must return to Step 4 and choose either “will post to Australia only” or “Local pick up only” in order to sell your item via the Fixed Price format.

Please note that only members registered on eBay.com.au are eligible to use the Fixed Price format with less than 5 feedback.

Answer 1

只有当你购买反馈分数为……（of后面怎么没有了）的固定价格销售商的货物时，才必须在澳大利亚境内邮寄。
意译的。