Hi there I am opening a hot dog joint where we will also sell hamburgers and I am trying to decide whether I should buy a new or used flat griddle. I spoke with a salesman at an equipment store and he told me if I buy a used grill it can be trouble if it has many scratches and deep nicks. He told me the food will not cook as well and also will get a different test. The problem is when I went to look at used grills they mostly all have scratches and nicks all over the surface. Can someone help me out and let me know if what the salesman said has any merit?