Is it a good idea to buy used cell phones so that you can save a bit of money? Sure, used phones are cheaper than new ones, but there are some costs you should be aware of. First, as the term implies, the wireless device have been used before. But how was they used, we don’t know. Were they ever damaged and got fixed later? We don’t know. Second, most of the used cell phones will not be covered by warranty. Either the warranty is expired or not transferable. In the cases that the phone breaks down you will have to pay for the repair cost. Third, buying used cell phones is not as cheap as you think, especially smart phones in high demand. They can cost as much as 90% of the original retail value depending on the condition. So, do you still want to buy used cell phones?