If you have bulk old telephone systems, you need to sell them as quickly as possible. The reason to sell them is that their value will depreciate over time, and then you won’t get the maximum cash out of them. I can see that you are thinking about selling old phones to online platforms such as eBay, but the problem is you have to bear the shipping costs, and you are not sure when your old phones will get sold. Now, to overcome this problem you need to go with another method which is to hire a professional telecom recycling company that can handle all your old telephone problems. They will offer a seamless recycling process with the proper disposition of the old telephone system.