You can buy just about anything online these days. Cat 5 cable wiring is no exception. It is available online, from a number of different vendors. As with any other product, prices can vary, so you should shop around before committing to buy. Consider the length of cable that you need before comparing prices. Comparing apples and oranges will not be of any assistance to you. Make sure you are comparing the prices on similar lengths of cable. Since it is available in a variety of lengths, be sure that you are ordering the proper item. Otherwise, you may not have a sufficient amount for your project, once your order arrives.