There are also Amazon listings where they have completely different products sharing the same page, using the UI that is normally intended for color/size/quantity selection. The reviews get mixed together and it can be difficult to tell which review is intended for which product. It would help if Amazon added fields to the review to indicate which variant the review was written for. Filtering would be even better.
So spin off a secondary site for the bazaar and protect the Amazon brand for selling quality stuff and only include the top-quality sellers on the main Amazon brand.