I try to add lot Number 300895449000 from ebay.de to sniper.
http://www.ebay.de/itm/ZSKA-Moskau-Pin-Rar-DEL-1-Bundesliga-Eishockey-NHL-/300895449000?pt=Fanshop&hash=item460ec42fa8
It is successful. But I click to link from mybiidder and see error
http://www.ebay.com/itm/Error?errid=12&item=300895449000
Will sniper work correctly?

If you were able to add it, it will snipe.
You see the error message because you opened using eBay US, while the item is available on eBay Germany only.