This deal is a more complex than the average deal, there are two offers you have to apply.
FIRST, buy US$45 of gift cards (=10+10+25 cards) from Fasttech BEFORE 4pm on October 30 for a 5% bonus credit on the gift cards. If purchased before 4pm on 30 October, you will receive US$47.25 worth of gift cards, for ~A$61 (depending on the exchange rate).
THEN buy the Raspberry Pi BETWEEN 4pm 31 October and 4pm 1 November. During that time, with the 10%-off coupon code listed above, the RPi price will be US$45.89
This will leave you with US$1.36 left over, which can presumably be used to buy accessories like a micro-HDMI cable, needed for the RPi4: https://www.fasttech.com/products/0/10042517/9146900-micro-h...
WARNING: in the event stocks run out, you could be stranded with US$45 of gift cards. Fasttech could also increase the price if stocks run low. If so, the gift card is valid for 5 years. On the previous RPi deal at Fasttech, the price did increase after ~18 hours: https://www.ozbargain.com.au/node/562756
Note also the Fasttech is not TechFast (this seems to come up in Fasttech deals), they are a Chinese wholesaler, and delivery is recently taking 3-7 weeks (see comments at the end of the previous deal: https://www.ozbargain.com.au/node/562756 )
They also have the 4GByte RAM model which will be US$63.35 during the deal, if combined with the 5%-off gift cards, you'll need to buy US$65 (=$25+$10x4) of gift cards for ~A$91, and you'll have US$4.90 left over. https://www.fasttech.com/products/1017/10013655/9725715
CashRewards also have 3.5% cashback for Fasttech, so you might get cashback for the gift cards purchase or when using the gift cards to make the RPi purchase. Unclear on CR website.
Full details here: https://www.fasttech.com/forums/promotions/t/3105857/no-tric...
UPDATE 26 October: Fasttech have confirmed that this is a version 1.2 board (the latest version).
I asked them via their customer support webpage "Is this version 1.2 of the raspberry pi, or an older version?"
They replied "The item SKU 9725714 is 1.2 version. Please feel free to write us whenever you have questions. We're always here to help."