Try getting things like Duracell and other frequently consumables. I think most people are rarely aware that they are actually buying counterfeits.

https://www.theatlantic.com/technology/archive/2018/04/amazo...

https://www.wired.com/story/amazon-fake-products-project-zer...

https://www.cnbc.com/2019/02/28/amazon-announces-project-zer...

https://www.seattletimes.com/business/amazon-ups-its-anti-co...

https://arstechnica.com/information-technology/2019/02/amazo...