US$4 off US$45, US$5 off US$55, US$10 off US$100, US$11 off US$120, US$20 off US$200 Spend @ AliExpress

Coupons as part of "Outdoor Best Sellers" promotion but appear to apply to all items.

Discount Min Spend Coupon Code
$4 $45 OF18
$5 $55 OD5
$10 $100 OF19
$11 $120 OD11
$20 $200 OF20
$25 $250 OD25

Credit: https://www.ozbargain.com.au/node/695923

Discounts based on USD price pre-GST. Don't know what the conversion is.