The Amazon deals may look great, but may not be as good as they look.
That's why you need the free service, "Camel-Camel-Camel" (http://camelcamelcamel.com).
It lets you track the price history of everything Amazon sells.
It is discussed (and praised) here:
So, before you buy anything on Amazon at any time, you can see if today's price is really that good a deal.
The Camel outfit has apps for other companies, including Newegg and Best Buy.