Undocumented ways to use Amazon (filter by Prime price, sort by Prime price, exclude Pantry items, get 15% off Subscribe and Save, find all free Kindle books, etc.)

Recently I clicked on a sponsored post that claimed that there is a way to hack Amazon search functionality and force it to do undocumented things. The link pointed to a site called SortByPrime (http://www.sortbyprime.com). I was skeptical at first, but after using the site for a few weeks I must say it is indeed…

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