How to find kindle ebooks which are really under 5$?

ebooks, epub, IFTTT, pdf, reddit,

I found this website: http://ift.tt/1mZZMTC but a lot of the books aren't under 5$ at all. Is there a smart way to sort for less than 5$ ebooks on Amazon? via /r/ebooks http://ift.tt/2ldyIrh