The Microsoft Store currently has 20% off a range of items on the eBay store.
Using the code ‘PSURFACE20’ you can get the Xbox One X down to $519 which is a handy $130 off the $650 RRP. I could be wrong but this is very near the best price in Australia. You can find it right HERE.
It says that there’s limited stock available so no guarantee on how long it’ll last. It’s also unclear if it’ll be restocked.