Since it's collection only, I'm not even going to ask the seller if she can be persuaded to send it outside of the UK.
Vintage Amstrad PC1640 Computer | eBay (http://www.ebay.co.uk/itm/Vintage-Amstrad-PC1640-Computer-/282053074961?hash=item41abac6011:g:xxsAAOSwR5dXTAA7)
Is anybody living close enough to Sheffield (I presume since the postcode is S18) to go for it and package and deliver it to Austria? I know it is a bit much to ask for, and for normal items I would not even think about it, but this PC1640 comes with an ECD and I can't remember seeing even one on sale in the last few years.
Needless to say, I'll cover the expenses and the asking price.