First off, it seems the freelancer payment options don't totally make sense with the way you described paying me in the job description, so I assume I will simply be paid in the form of commission as you wrote in the job details.
I have years of experience with selling on eBay. while I don't reside in Italy I am an expat in Europe and can manage it with tools like VPNs if location becomes an issue.
I have a personal account that I've used for years, selling items, and for nearly 2 years I managed and operated the eBay page for a computer business, selling nearly 200 items in my time there.
I am eager to get started. I am very serious about my interest and can start straight away.