Amazon and Ebay webstore setup and customized

Hello, We someone who is familiar with designing Ebay and Amazon stores. We currently subscribe to both and have setup to have webstores with both, but they are not functional at the current moment. We may also decide to incorporate Vendio also, so if you have knowledge of their services that would also be helpful. We are looking for full setup of both of an Ebay store and Amazon, we require both to look very professional and function smoothly. Please if you have any questions or suggestions let us know. Thanks for looking and bidding on our project.