Since we mention a lot of deals at Amazon, here’s a tool that can help you keep track of prices there: refundplease.com

If you purchase something from Amazon (or other online retailers) and the price drops within 30 days, they will credit you the difference. Of course, no one (hopefully) has the time or the desire to keep checking back on Amazon to see if the price has dropped on something. Refundplease.com makes it easy because they will notify when the price changes. In a broader sense, this can just be used to monitor the price on something you are waiting to buy, rather than something you already bought. Why buy something and then go through the hassle of getting $3.83 back from Amazon when you can wait for the price to drop before you buy it?

Amazon Price Watch is another site that basically does the same thing.