You just need to be a little more specific with your search to narrow down the number of items.
I remember when I first learned about ebay! I was taking some courses at the community college and one was a computer course. My instructor was buying and selling old greek coins on ebay and he would check his auctions during class.
I started to "study" ebay before I ever bought anything. Then once I bought a few things I decided to try selling. I found my "niche" - which is old dishes. They say that you should sell things that you're familiar with and I've learned a lot about old dishes, especially corelle, corning, and pyrex!