Can ChannelAdvisor help me list my products that are both already on Amazons site as well as products that do not exist on Amazons site?
Yes, ChannelAdvisor can help a seller list ANY product that already exists on the Amazon site and can also assist sellers in create new listings in a variety of categories. ChannelAdvisor offers support for Amazon Seller Central US, UK, FR, and DE. Each locale has a list of categories that are available.