@twyngwynwrote:
When you start a listing, you will be able to search for a product in the eBay catalogue by using a product identifier like UPC, EAN, ISBN or keywords. Once you have selected the product from the catalogue, you will continue with the rest of the listing experience.

 

Starting in May 2018, if you are selling an item in the select product lines but you do not associate it to a product from the eBay catalogue, you will be unable to complete the listing.


Good luck with the ISBN's - I've found the category assignments to be largely rubbish.

 

Print assigned as audio, anything remotely instructional becomes textbook etc

 

It's an absolute dogs breakfast and contrary to eBay's claims, there is no way to flag items as incorrect.

 

Maybe that will come later but I'm not holdin my breath.