Looking for iPhone/Cell Phone Drop-Shipper

We used to run a buyback company and sold our phones on our website, http://www.gadgetchest.com . We are now out of inventory and are left with a retail website in very good search engine placement from our efforts of Internet Marketing and SEO. We are looking for a partner to fulfill orders we receive on our website for used iPhones and cell phones in A/B condition, tested, fully functional. We are interested in different types of partnerships, but one way we have specifically thought is that we would spend the time and money on marketing and SEO, and the supplier would fulfill orders, deal with customer service, and returns. The supplier can set their own prices, and we will receive a commission on each sale. Again, we are open to other ideas as well." Thanks!