The guide no. listed above contains information that is against Ebays rules. It mentions sending stuff abroad using surface mail which is not allowed under Ebay / Paypal seller protection policy where by everything has to be sent signed for i.e. tracked and must reach it's destination within 20 days after payment so UK stuff to the States won't get there in time. You must be aware of this as Ebay / Paypal won't help you at all as a seller if it is not sent tracked. Read the sellers protection policy for more details.
All the best