I finally decided on a name for my google add-on:
ebay Data Extract
I've kept it simple and to the point. I had been concerned about using 'ebay' in the name but I've checked other add-on's in the Google Marketplace and there are a few that also use 'ebay' and more that use 'Amazon' in their product names so I will follow suit.
I'm currently finalising all the details for my submission of my add-on to the G-suite so hope to be live shortly.