Currently in stock with free international delivery. Appears to be lower than the previous lowest price two weeks ago.
SAMSUNG 870 EVO 2TB = $200.49$197.24
SAMSUNG 870 EVO 4TB = $452.12
Per comments; Samsung may refuse to honour warranty claims (5 year warranty on the SSDs) for purchases from Amazon US sent to AU.
Worth noting Samsung usually refuse to honour warranty claims for purchases from Amazon US sent to AU. Makes the 5 year warranty useless. A few reviews on the items confirming the same.