Despite how large it has become, Amazon is not always the best choice for low prices.  In fact, most of the time the things I research on Amazon are more expensive than at places such as Walmart.  That being said, you can find some killer deals by taking advantage of the Subscribe & Save feature on certain items.

What is Subscribe & Save?
Subscribe & Save is a program on Amazon that allows you to sign up to receive repeated shipments of an item at intervals of your choosing.  For example, we Subscribe & Save to Yuban coffee and have it shipped to us once per month.  The delivery frequency can be customized from one month to six months, and you can buy any quantity at a time.  The discount for Subscribe & Save items is 15%, and shipping is always free on those items.

Although you are subscribing to receive the discount, you can cancel anytime.  If you know you want only one of an item, you can Subscribe & Save and then immediately cancel your subscription.  For the most part, the items you can get are ones you would want to subscribe to so this isn't something I have had to do often.

We get bar soap, diapers, coffee, baby soap and my favorite lotion through this program, and save quite a bit over other sellers.  Amazon always emails you about a week before so you can be prepared, or choose to cancel if you don't want a shipment this time.

You have to really do your homework, but Subscribe and Save can give you a great deal on items you regularly use.