Listia Rules State that there can be NO restrictions once you put free shipping. You can only set a shipping amount and then offer free shipping if GIN is used. Anything marked free shipping must be sent for free. I am just letting you know that it is specified within the rules in case you were not aware. You are absolutely not allowed to put free shipping and then only give it if gin is offered. Though you ARE allowed to put a shipping cost and make it FREE if GIN is used. Don't ask me why that is how it goes.