I am hoping to sell 15 indivdual items through a custom online form. I do not want to sell the same item twice. I see how to list out the individual items for visitors to choose from when they complete the form. Is it possible for the form to update after each one is submitted, so that the chosen item will then either disapper or appear with the text stricken through?
Sorry this is not something that FormsCentral supports. You need to manually monitor your form (if you have a paid account you can turn on email notifications to know when someone submit a response).