Half of my inventory comes from eBay. And I sell a lot on there as well. Buying and selling on eBay has given me great insight into the minds of both buyers and sellers alike.
Bidders do things that drive sellers crazy, and sellers do things that drive bidders crazy.
This will make your eBay experiences more enjoyable in the future. The brief description can be the title in the auction. Include a very clearly written or typed mailing address with your payment. Reply to emails. Some sellers want you to reply to their emails with your name and address so they can prepare your package.