Some time ago another kind poster mentioned Camel for price tracking. So I'm passing along the favor. It was easy to set up and use. I'm just a happy user, no connections to Camel. Camel gets their support by users clicking through them to make their Amazon purchase. I'll do that for anything that Camel helped me purchase low.
You can see a typical screen shot below showing how Camel displays the price history and allows you to easily set the price you want to be notified about. Shows an example for my purchase of a subwoofer that was low cost and had great Amazon reviews. I just set the price around the previous low sales numbers plus $1. Got it for $90 by using Camel and being patient. The link to the Camel site: Amazon price tracker, Amazon price history charts, price watches, and price drop alerts. | camelcamelcamel.com