Thank you for this opportunity. I offer various services via online freelance sites. I am an experienced freelancer/contractor with a wide range of skills including ecommerce, data, marketing, and website development. Trust me to deliver your project to a high quality and in a timely manner. I am new to using Freelancer.com, but I can assure you that I have completed many projects on various platforms and have the experience you are looking for.
Please contact me to discuss this. I run my own two ecommerce sites and use Ebay every day. I have software that can help you to manage some of these things, and keep them uptodate more easily. We can start with everything being done manually, and then move into automating some of the processes.
The fee is for initial setup. Ongoing monthly management we can discuss.