Incredibly this code appears to work on many eBay stores that accept Afterpay. Tested a few products on TGGs, Bing Lee, Appliances Online (very rare to get discounts here), EB Games, BIG W, and Microsoft and it works fine. Apply code PAPY10 (or PLUSAY12 for Plus members) at checkout and select Afterpay as your payment method. Get an additional 2% off if you're an eBay Plus member. There's a $100 min spend requirement, and $150 max discount. Feel free to comment any new stores you find where this works. Take care, and enjoy :)
Mod Note: To avoid being required to pay using Afterpay, can also use gift cards as full payment instead and the coupon still works. Thanks to doweyy.