Amazon's historical price

EngliDict

A professional Amazon product price tracking tool that helps you make wise decisions when shopping on Amazon. It directly displays the historical price trend chart on the Amazon product page. Support multiple Amazon sites (United States, United Kingdom, Germany, France, Japan, Canada, Italy, Spain, India, Mexico, Brazil, Australia, Netherlands). Automatically detect the products currently being browsed, without the need for manual operation. We provide historical price data to help you determine whether the current price is worth buying. A simple and intuitive interface design that doesn't affect the normal browsing experience.

Screenshots from Chrome Web Store