If I remember correctly, if you have a business account on eBay, you have an option to out your business contact details at the bottom of each listing. (I think just address and phone numbers thought, not websites)
Unfortunately there is no option to have the details in a prominent location in the listing, but better than nothing.
yes as a business seller I have to have my details available in the bottom of every listing.
So it has
my email and phone number if required.
Just the fact that some geniuses were laughed at does not imply that all who are laughed at are geniuses. They laughed at Columbus, they laughed at Fulton, they laughed at the Wright brothers. But they also laughed at Bozo the Clown.