Mi Band 4 from Official MI Store on Ebay for $47.96 delivered after coupon code. Possible Cashrewards/Shopback for further discount.
Been cheaper before of course, but possibly cheapest at present for AU stock.
As per JVs post, use PEACHY20 instead to make it $47.96.
I had originally listed the PLATEAU code which took 15% off (valid until 31/12)… so when PEACHY20 expires on 15/12, you can use PLATEAU.