Just curious as to why Amazon Australia do not sell them, and not been able to google a definitive answer.
I have just got a friend in the UK to buy me a Kindle Fire 8 tablet as they were half price (45 pounds - $A82) in the UK Prime Day sale. Delivery date is not till late November due to overwhelming numbers of people buying them at that price. So I would not expect to get it till early next year depending on UK post office and then the Aust Post delivery debacle going on here. If anyone knows a better way of shipping from UK to Oz, I'd be happy to hear it.
The tablets are heavily subsidised by things like ads, app store purchases, and even Amazon store promotions that show up in Amazon's android ecosystem, basically with every tablet they sell it's a way of making sure that whoever uses that tablet sees more of Amazon's eBook / Prime Video / Music products and essentially lock them into their Prime sub.
Comparatively speaking, our US friends pay more for Prime than we do. It's USD $12.99 in Amazon USA, but only $6.99 AUD @ Amazon AU
Since Amazon isn't really big enough in Australia yet and they have a smaller market share they probably don't think it's worth the expense of bringing it here. That said we still have Amazon Kindles and Fire Sticks.
Perhaps the Aussie market just isn't really into cheap android tablets, and Amazon knows that through data.