Your main problem will be with the shipping costs. If you are stocking your own items, you will have to compete with similar sellers that will beat you in shipping costs.
If you are using a dropshipper from the area you are selling to then you should be OK.
Your other problem is if you are stocking your own items, you will have to get them to Australia which can be costly.
I know the community manager Fudjj is from Australia. He may have some more options for you. you can PM him and when hes is online he will get back to you.
I have another option for you though self serving. I have a website that dropships for free to anywhere in the world. Link hidden: Login to view
If you like the products your welcome to give it a go.