ZINUSSALE50
Quite a few items with 50% off on Zinus eBay store.
You can add another eBay PLUS coupon on top of that.
Examples:
Zinus Mattress (all sizes) from $134 (RRP $269)
https://www.ebay.com.au/itm/363721665576
Metal Bed Frame Queen Single King Double Mattress Base Platform Wooden - Zinus from $164.50 (RRP 339)
Coupon expires 5th December
Max discount $2,000
Delivery seems to be free, not sure if there's a minimum amount.