The flip side to this is I've on multiple occasions had Amazon ship me clearly used shit resold as new — Amazon.com was the seller.
One even came with a sticker: "Thanks for giving this product a second life!"
The worst of the worst among us use Amazon as a try-before-you-buy or rental house. Their lax return policy encourages them.
If I buy anything important, especially expensive electronics, I buy it from somewhere else. If it's a reputable store with a strict return policy, I'm doubly sure there will be no fuckery.
This happens with items where it's clear no human even glanced at it. I received a sump pump that was wet and dirty!
Returns are monitored and you will be restricted if it looks like you're abusing the return policy
I remember why most of the stuff on the frys shelf was like this. I think it was their downfall and for me i stopped shopping there because of all the broken items. With Amazon at least I don't have a huge cost to drive there and back.