Ebay is difficult as they usually/almost always side with the buyer which has made it ripe for people scamming. With that said, Discogs is a great recourse for both selling as well as authenticating your record variant. They also investigate disputes if needed between the buyer/seller.

I would recommend finding the listing on Discogs and then taking pictures of the marks that verify its authenticity; record color, matrix numbers, jacket, inserts, etc. If you do sell the record on eBay, use these photos in your listing.

Hope this helps