Google Nest Mini 2nd Gen $44.99. According to PriceSpy, this is the lowest price recorded.
Costco's item numbers are 54013 (chalk) and 54014 (charcoal). Cross-referenced with the Costco Australia website and it shows up as the 2nd Gen Nest Mini (GA00638-AU)
Valid 25 November 2022 to 28 November 2022
Terms and Conditions: Only valid in the Costco Warehouse and while stocks last. Purchase limits may apply to certain items. See your Costco Warehouse for more details. Introductory specials are valid only in warehouses from 25/11/2022 - 28/11/2022 inclusively. Items shown are representations only and colours and variants shown may not be available at all times during the sale period. *Total amount saved on the purchase of one of each advertised sale item.
These are quite often packaged in bogof deals so the price history on PriceSpy for them is a bit misleading. The last deal posted here was 2 for $69 through Dick Smith and they've been 2 for $89 through The Warehouse quite a few times. Wakrak did some of his price kung fu wizardry and even got them down as low as $22ea at The Warehouse one time.