I've looked at a handful of price watching services, but this one has got to be the coolest. It's called Pricepinx, and it's been designed to work on any site--not just some of the big retailers.
All you have to do to get going is add a small bookmarklet to your browser, highlight the price of the item and click on the bookmarklet. If there are any changes in price, you'll be notified by e-mail. As an added bonus for those who register with the service, added items are pooled together in a list. You can … Read more