As per the title, this seems to be a one day offer only! I checked in store too but the in-store sale on G-Shock watches is already ended and Brisbane city store is out of stock on them.
Please note that the discount is automatically applied after adding the product to the shopping bag! Free shipping is available for orders above $50 making the deal even more sweet!
Just purchased a GA200 for $167 delivered which has a RRP of $299 and Kogan is selling it for $159 delivered but I prefer to walk into a brick and mortar for an extra $8 in case of warranty issues!
The offer is valid for all accessories but I have used it only for men's watch. Feel free to share your finds in other categories :)
I purchased the GA100 from eBay for around $110 at the start of last year.