You can also share printers, although you'd need to leave the "host" computer on in order for the shared printer to be accessible by your other computers. Otherwise, there are portable print servers that will turn a USB or Parallel printer into a networked one.
Be careful with GearXS; a lot of the stuff they sell is OEM or surplus and doesn't include the full packaging, even though their pictures show otherwise. While that doesn't mean the product will be defective, manuals and software discs generally aren't included. I've also been burned by them on a returned defective keyboard; sent it back and they claim they never received it, and USPS delivery confirmation does not provide enough information for them to say whether they actually received it or not.
