You have opted into Ebay's Global Shipping Programme.
You don't need to invoice the buyer as Ebay will send an invoice.
You will receive the UK postage charged and will send to a UK address as shown in order details.
Costs for forwarding the item to your buyer will be collected by Ebay. The details below are from the item you sold today:
International Priority Shipping
Estimated between Tue, 11 Feb and Tue, 18 Feb
Postage: £22.47
This item will be sent through eBay's Global Shipping Programme. Includes international tracking, simplified customs clearance, and no extra charges at delivery. Learn more
Import charges
Est. £19.77 (approx. £19.77)
"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)