If you end up being the high bidder, you will deal directly with the seller of the item via email. You will mail your payment to the seller and the seller will ship you the item. Ebay has a feedback system that serves to protect buyers and sellers. As you explore the site, you will see user id names with numbers next to them. These numbers represent the amount of feedback that person has received.
Feedback is either positive, neutral, or negative.
You can click on this number to read their feedback profile. Buyers and sellers may leave feedback for each other upon the completion of a transaction. But it is really not difficult at all. Again, before you list an item for sale, check out auctions for similar items to get ideas about how to design your auction and what price you can expect for your item. You do not have to have a photo of the item in the auction, but it is a good idea to do so.