I am using version 1.8 and am using this for a pre-school class registrations and classes. What we would like is to be able to offer a free class that parents can register for so that they could try the class out. Would it be possible to restrict this to a single purchase per customer, so that they are not able to register for this free trial class multiple times. As this is a free item, is there a way to bypass the shipping and payment options.

Thanks