Creator it is still up to the seller to decide if he want to post outside the UK . There is no compulsion to force a seller to trade in Europe or the world market place. It will be interesting to see how their perceived postage correlates with the actual PO when you take it down to dispatch
But the seller won't be posting outside the UK. That is the whole point. They will be posting to Ebay in the UK. It is then down to Ebay to to deal with the onward shipping abroad.
eBay Global Shipping Programme: What is it?
The Global Shipping Programme is eBay's attempt to open up items for sale on its auction site to a global- rather than local audience. It is well aware of the fact that many of its members will refuse to sell outside the UK, simply because they don't want the hassle of posting items abroad. The Global Shipping Programme removes this hassle.
Nothing will change for you the seller: you will get a UK postal address to which you should despatch your item. eBay then posts the item abroad on your behalf. This means you get a much bigger pool of potential buyers, without the hassle of working out international postage costs.
And as the buyer, there will be no more desperately trying to convince another eBay member on the other side of the world to sell you an item, only to be turned down because it sounds like too much hard work. It also means international postage will be accurately calculated by eBay, so you won't get ripped off and pay over the odds for the priviledge.