I have sold some items overseas but they were on the international shipping programme so Ebay added the postage to the buyers invoice but I only had to pay the 2nd class postage of £3 when I printed the shipping label
You've just entered a whole world of pain. At the very least they will claim not to have received it then you'll have issue a refund and all the associated agro with that. Ebay nearly always favour the buyer. I never sell abroad, as much as ebay claim to have set up a painless system it's nowt but agro.
Thank you all for your replies.
After all that even thought the buyer was in Poland it’s getting sent to an Address in Edinburgh just up the road so saved myself a whole end of grief .