1. Buy a digital key from eBay can be steam, antivirus it doesn’t really matter
2. Open a dispute directly in eBay for the item you purchased
3. eBay does not allow the sale of digital items on their platform
4. You should win the dispute 100% of the time
5. Sometime ebay ask key is valid or not you need to say not work
6. use old ebay hacked or cracked account
7. Profit sell the key or redeem it for yourself!