Just noticed theses are $129 at JB Hifi,
Battery one also available: https://www.jbhifi.com.au/products/google-nest-protect-smoke…
Very annoyed as I just bought 3 @ Officeworks last week for $149.
UPDATE: GoodGuys have matched the $129 so with the TODAY code it comes down to $116.10 for both wired and battery
Do these have double insulated wires yet? There was an issue with non-compliance a few years ago.