The PC Guide's IP address for example is 209.68.14.80. Knowing the IP address can sometimes make it faster for you to get to a site, since it saves the step of looking up its address. If you know the IPs of your favorite sites, you may in some cases be able to access a site even if your local nameserver is down. Remember also that even from normally reliable sites, accidental virus infestation is not unheard of. You may be surprised.
Many companies also have restocking fees for returned items.
Find out before you hand over your credit card number. If you plan to install any operating system other than the one that comes with a new laptop, be sure to verify in advance with the manufacturer that the operating system has been tested with the laptop's hardware and will work properly. It may be that it will work, but only if certain drivers or other software is updated. Too many people simply disconnect the power while Windows or another high-level operating system is running. This can cause all sorts of problems, particularly, file system corruption due to open files not being closed, and cache writes not being flushed to the disk.