It can also indicate that there are other competitors within the same marketplace that you plan on entering. If they have an established website that has a lot of followers you may not be able to make a profit. You will want to eliminate it as a viable income source.On websites like eBay and Amazon, customers judge your credibility on your seller rating. Users who buy your products will give you a score and comments based on how well you did. New sellers will always start with a blank slate, so to build your reputation, sell smaller. Lower priced items will make users feel you are less of a risk. After enough successful transactions, you can build your stock.