Have you built an eBay store?
There are utility programs that allow you to build your inventory off line and then bulk upload to eBay. Look at Turbo Lister, InkFrog, WebStore, Froo! Bulk Lister. There are others if you search.
Try these sites for more information:
https://support.sellbrite.com/hc/en-...-eBay-Listings
https://help.sellercloud.com/article...tings-overview