I like money back

I am testing a new service called Paribus,that basically goes through your Amazon purchases, finds any items that have fallen in price since you bought, and tries to refund you the difference. If you're interested register through this link and you will get a better refund percentage.

Don't feel obligated to try it. It is free but they do need a lot of info and if you're skeeved out about that sort of thing, then skip it.