Hi,
I am interested in your project.
I have much experience on Opencart, you can check profile to know more in detail.
Noted, all my projects on freelancer is on Opencart.
https://www.freelancer.com/u/Ginjag.html
I’ve read and understood your requirement. I have had a lot of experience on Opencart and connect to Ebay..
Please feel free to contact me and I will start immediately.
Hope to work with you.