Lighting Drops tracks daily price drops of several products on Amazon to help you make informed buying decisions when shopping online. You can search for items either by description or product ASIN and view their historical pricing. Data can also be sorted and displayed by category and time frame.
You can setup price tracking alerts and receive email notifications when the price of a product meets your set condition.
I’ve been using this site for a while now and find it to be quite handy to do a little price comparison shopping on Amazon Canada. It only works for Amazon Canada, but if you plan to make a purchase there, it’s great for tracking the price history of an item and seeing if you are getting a good deal or not.