We use screen printing process to make these signs so, even if you make a small change in a design drawing, we have to make an extra screen. If you order 1000 signs with 2 designs (500 + 500), this order is like 2 different jobs to us and the price will be as if you order 2 sign sets x 500pcs each. We are ready to give you a discount price because you are going to place 2 sign orders instead of one, please provide us with the details of your advertising project.