There's some percentage of people that always want to pay the lowest price and if the product turns out to be fake they return it. Say you order 100 things over

There's some percentage of people that always want to pay the lowest price and if the product turns out to be fake they return it. Say you order 100 things over a month and 5% turn out to be fake the only cost is time (Amazon pays for shipping if the product is fake I believe). That's compared to paying 10% more on every product plus the time it takes to go to the store.