looking for used Iphone 4/4s/5 supplier

Hi, We buy for our overseas refurbish factory. We are looking for long term stable suppliers. We would take any quantity from 100-10k pcs weekly. We take: all A/B/C grades, working or damaged even no power all carrier att, sprint, and Verizon, both GSM/CDMA no need for unlock Please note the only phones we will NOT take - water damaged or opened/touched/refurbished Seriously business only, otherwise please don't waste your time. Thank you, Lisa