I used to do hand silk screening on fabric and went to craft fairs all over the north east and south. It was not uncommon for some dufus to come up an ask - did you do this? and upon replying Yes, they would say then I am sure I could do it ....
My idea of the ultimate craft fair is for all crafters to show up with only a coke vending machine, something that everyone could sell, everyone would buy and not argue about the cost.