I have a very simple bookmark let that only shows items sold by Amazon.com without having to filter by category. I think part of the issue is that their site UI is pretty horrendous, and makes it difficult to limit searches. I do however notice issues with some items sold by them, but primarily with descriptions being incorrect or them combining a bunch of items with reviews, sometimes for completely unrelated products. I personally try to avoid third-party sellers for the most part. I would love to support smaller businesses, but to be honest you're probably doing most third-party sellers a disservice by buying on Amazon, especially if you think there is a possibility that you'll return the item.
