Not that shopping online is all Web and roses. There are some things to be wary of. That low, low price you found for a 19-inch monitor may not be so low after you figure in tax and shipping costs. And if it's refurbished equipment, you can save lots of cash upfront, but sometimes manuals and software aren't included, and the regular warranty is usually cut short. You might have to dig around the order page a bit, but don't say yes until you know what the real total is and what you're paying for.
Auctions are the iffiest.
You may get a great deal, or you may get royally ripped off. If you must bid, investigate the seller's ratings and ask lots of questions. Scheduling a field trip to your local CompUSA, OfficeMax, Circuit City or Office Depot affords you a chance to meet and greet your potential hardware. Prices generally won't be as low as on the Internet, but the convenience might make up for it. Plus, you can always hop back online at home if you want to.