Now could be a useful tool for a bargain hunter or the chronically cheap frugal like myself. Amazon Credits You is a site that claims to monitor Amazon price changes on items you have purchased. Why? Because for 30 days after purchase, supposedly, Amazon will refund you the difference if their price on an item drops.
The trick is, you have to notice that it happend and make the request. Supposedly this tool does it for you. I can’t vouch for it’s effectiveness since most of my Amazon purchases are from the used book sales but I’ll definately give it a shot next time…