Are you sure it's not a scammer as an expensive item bought from  an overseas buyer is always a red flag ?

Just to be careful, read this thread and see if anything sounds familiar

https://community.ebay.com.au/t5/Selling/Is-this-a-scammer/m-p/2603019#M237367

Your payment, after any hold time, has to go into an Australian bank account, thus must be in AUD.

No exceptions.

I would suggest a good starting point is to read the FAQs about selling now (not once long ago), register for Managed Payments, pull any listings until you understand how selling now works, and be VERY wary about selling overseas.