Thanks to baller for posting the Dick Smith deal.
I have successfully bought a pair of Airpods for $175 using a $50 Voucher (Find one on eBay for <$16) and a $10 referral sign up bonus.
Some quick maths:
$215 (Kogan Price) - $60 (Voucher + referral bonus discount) + $16 (Cost of voucher) = $175 total paid
The historical low price for these are $170
Your dad is 44