If you are buying anything, get the lowest price by using one of 20 price trackers reviewed by CNET. I highlighted a few interesting ones below, though I encourage you to read about all 20 in the original article.
Amazon Price Watch (aka NukePrice.com)
“Amazon Price Watch may sound like it’s only Amazon.com prices, but it actually works with around 100 online retailers. You can have it watch the price of something by dropping its link into the service’s Web form, or by installing a browser add-on that lets you start tracking from the retailer’s site. Along with price-watching tools, it’s also got a deals finder and a “filler items” tool that will help you find low-priced items to add to your Amazon order to get free shipping.”
“EDealInfo may not be the prettiest site of the bunch, but it’s got a simple and powerful way to build a deal alert without too many specifics. For example, you can keep track of an entire genre of products for price drops, like all digital cameras from a certain retailer, or group of retailers. It’s also registration-free.”
“NetHaggler is a service designed to let users band together to get a lower price from a retailer by buying a single product as a group. It also has a price tracking feature that lets you bookmark items you’d be interested in buying for a certain price. Its system will then send you an alert either if your product falls within the price you’ve set, or if it’s been able to haggle down the price by bulk buying with other users.”
“ShoppingNotes is one of the simplest tools on this list. There’s no sign-up, you just give the site the product page URL (or URLs as a group) and your e-mail address. It then sends you an e-mail if the price goes down. Besides its main site there’s a bookmarklet you can add to your browser to begin watching a price from any site you’re on.”
“ZingSale is one of the prettiest sites on this list and, like the others, is set up to let you quickly put together a list of items you want to track for price drops. It’s got a fast and smart search engine, with a very deep level of categorization, which can help narrow down your searches. And its e-mails lead directly to the retailer that’s selling it at the lowest price.”