We suggest you walk the market ahead of time. Do you see something that is not being sold at the market? That may be a good item. Do you know of businesses that liquidate their overruns or surplus? That may be an opportunity. Do you offer a service as your regular job? That may be an idea. How inexpensive it is to put your service out there in front of up to 12,000 shoppers? Be creative, think outside the box.