eBay

I am selling my comic book collection. Is there a way to show what ebayers are buying, so I know which books to list first

I had a buyer pay too much for shipping. How do I give them a refund?

I am new to selling. Maybe I just need this explained to me like I'm a child. I know ebay takes a final value fee. I don't seem to have nearly as much as ebay says I sold. What percentage do they take. All I am selling is comic books. If I read corre...