I know a few people have been waiting for another Dell 20% off, so here it is! :)
Max discount $1000 per transaction. For some reason they have pulled the search link for the eligible products which should be here (according to T&Cs):
https://www.ebay.com.au/e/_sales/20-to-22-off-dell-storewide…
Still, seems the code works on Dell products and a quick scan of the Dell eBay store indicates it's storewide, e.g. S3222DGM Gaming Monitor $559.2, the classic S2722QC at the (not that great) price of $519.2.
I'm sure you will find better deals as you look through the store, I only had a quick scan so if you come across anything particularly good, post it in the comments and I'll add it to the description.
Edit:
Looks like some great deals on laptops, e.g.
Dell Inspiron 15 3525 Laptop AMD Ryzen™ 7 5825U 16GB RAM 512GB $778.56
