after you figure that out, you will have to decide how you are receiving the shipping cost, most use PAYPAL because it is secure, however not all use it. some accept money orders or concealed cash, but paypal is great because everyone is secure and their is a record of receipt
that's ok... try weighing in the packaging you are going to use. then go to USPS.COM enter the box dimensions, weight and zipped you are sending it to. it should give you a decent idea of the shipping costs. :-)
also Hope if you click on my comment and use the reply button it lets people know you responded directly to their comments with a notification alert. Hope this helps you some.