How Does It Work

I think it is a great idea to try to recycle these days as much as possible but how does it work if I want to buy used cell phones and accessories? Whenever I go to trade in my phone the company that I deal with always wants to charge me for taking my old phone off my hands. If I have to pay them to take my old phone and then they get paid to sell refurbished equipment I think that is a genius idea. Maybe I need to start figuring out how to do this or at least have them pay for my old phone when I am done.