The Internet makes every single person capable of finding the best deal on just about any item they could want to buy.  From CD's to books, computers to cars, you'll find it quick quicker & cheaper on the 'Net.  Once you start using the 'Net for all of your shopping needs, you'll truly be considered a smart shopper.

PriceWatch - This site scans all of the major e-commerce sites and returns to you the lowest available price.  Nifty.  :)
http://www.pricewatch.com

eBay - If you haven't heard of this one, lift the rock off your head and keep reading.  eBay is one of the more dominant auction sites.  You can buy & sell just about anything on here.  People have sold body parts, themselves, guns, bombs, companies, etc.  You name it, it's been sold on eBay.  :)
http://www.ebay.com

Shopper - Find the lowest price on any computer related item.  This site is the bomb!
http://www.shopper.com

WebAuction - I've already saved myself hundreds of dollars by using this site.  I got a $500 Panasonic digital camera for $170, a $300 Clarion ProAudio head-unit (radio) for $90, and two Motorola TalkAbout radios, (which normally cost $150 a piece) for $140.
http://www.webauction.com

NCBuy - Get super-cheap subscriptions to the bombest magazines and much more.  You gotta give this one a peak!
http://www.ncbuy.com

Jango - Search hundreds of Web sites for up-to-the-minute product review and pricing information.  It's fast, convenient, and oh-so-easy!
http://www.jango.com