If you offer free postage (seller pays) and sign up to Ebay's Global Shipping Programme (GSP) then you will only have to post within the UK.
Items sold internationally using GSP are sent to a UK hub.
Your overseas buyer would see a cost which included VAT and a charge for international shipping - Ebay collects those amounts and the cost of the item only goes through your account.
Use 'Help & contact' top left of your Ebay page to read about 'Simple delivery' and fees for international sales.
"There are two ways to be fooled. One is to believe what isn't true; the other is to refuse to believe what is true.”
Søren Kierkegaard, Danish philosopher (1813 - 1855)