I learned the most important thing about selling on ebay is to try to sell a variety of items for a variety of people. I tried clothing, cosmetics, vitamins, shoes, and various other things. Its really  not about having lots of items its about variety. The more the variety the more people you attract. Variety will help you target lots of different buyers. Provide great service and fast shipping and you can sell anything to anybody. Satisfied people can't help but come back over and over. For example sell mens, womens, and childrens clothes, shoes, accessories, toys, collectibles all about variety.