Use this script to see previous price data for items on amazon. The script retrieves graphs from camelcamelcamel.com and injects them into amazon.com product pages, it also provides a handy link directly on the graph image so you can visit the product page on camelcamelcamel.com and set a price-drop notification.

If you would like to contribute or make suggestions for this script please do so here:
https://gist.github.com/JacobTravers/19c2b26ee47877ca50bdaaeed46da218