This is a strange one guys. It keeps coming back in stock for pre-order to be fulfilled in June by amazon US multiple times a day. 3rd party sellers have it listed for $134.99 but amazon do it for as low as $70.18. I just ordered one yesterday for $71.47 with free post being the order is over $49 and I have prime.
You will need to use camelcamelcamel to get an alert for it. Keepa doesn't seem to work on this one.
Read the comments, looks like a really good unit and a real saving on TP for the next apocalypse.
Apparently you will need this fitting in Australia and maybe a longer hose from bunnings to reach other side of toilet.