Audioengine A1 Wireless Speakers - Dark Grey available at Amazon for $263.20 + free delivery.
20% Applied at Checkout
These retail for $329 so you save 20%.
Next cheapest looks like Scorptec @ $299 -> https://www.scorptec.com.au/product/speakers/2.0/88024-a1
Showing as $329 for me still
Edit. It seems the 20% if at checkout. OP maybe update the post to mention this?