If you are a seller of second hand goods or sell at a flea market or swap meat then you can register for free as a seller. As a seller you will be able to add in the URL of your website and eBay store and list as a seller under flea markets you sell at.
Listing as a seller under flea markets you sell at will allow user to contact you so they can inquire about products you have, post sale questions, etc.
And of course it’s FREE. Just click on the edit profile link in your profile and change the user role to Seller.