It's definitely scraped with a few simple queries and not moderated by a human, you have to manually check before buying of course. It just saves a few minutes of time automating the initial search.
I think there will eventually be a false advertising lawsuit or some regulatory action against Amazon about this. Until that happens, it’s hard to say for certain which items are used.
https://news.ycombinator.com/item?id=39262314
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