As a customer, why should I purchase a used, 3 year old cell phone, with 5 year old technology from you, when I can go to Verizon and upgrade my phone every 2 years, and get a fully up to date phone for very little cost? If you can answer that question, you may be onto something for your area. Here, I don't see it working out.
I think the last time somebody released the stats, Verizon had over 70% of the cell phone market. My cell phone cost me $99, for a phone that was released on the market the week before I got it. Yes, I had to sign a new contract, but I have been with them for 8 years, and with all my customers, friends, and family with them, I never use most of my minutes, so why would I suddenly choose a new carrier? (for the record, a Razr HD Maxx)