Moved to Forum: Original Link
Confirmed code is working for Officeworks and the Good Guys though you will need to pay for delivery as pickup is not an option. Find something that has free shipping.
Max discount is A$16.30.
1) find an item on eBay Australia
2) change the .com.au to .de (you may need a browser that can translate e.g. Chrome)
3) apply promo code and checkout
Does not work on eBay gift cards (first thing I tested).
I was able to successfully purchase a $10 item with free delivery for $9.
Note that the promo code can only be used once.
The voucher does not apply to the categories "Car & Motorbike: Vehicles", "Cigarettes & Tobacco Products" and "Cigars & Accessories", as well as products, symbols or brand names of cigarettes; "Beer, Wine & Spirits" category, as well as products containing symbols or brand names of alcoholic beverages; Category "baby food"; and the categories "SIM & Phone Cards", "Books", "Coins", "Product Guarantees & Insurance" (eg insurance products from Allianz) and "Real Estate".
Mod: Appears the deal is not working in Australia, moved to forums.