David Jones has the Sonicare toothbrush heads back (still?) on sale after the recent Easter deal. I purchased some for Click & Collect at Macquarie Centre and it looks like there's stock in plenty of other NSW stores. Pricing appears to be the same in-store as well (assuming you can locate physical stock on shelves). The black 3 pack is the best deal here as the white heads are only available as twin packs for some reason??
Don't forget an additional 6% off via Cashrewards bringing it down to $28.15/pack.
Black 3 pack available here
White 2 pack available here
White compact 2 pack available here
why are the compact ones dearer than the big ones? I had stocked up on these from costco https://www.ozbargain.com.au/node/297308
but would like to buy some of the compact ones for my kids.