I am also finnish and quite familiar with situation that we don't have a single retailer here since "the-notorious- moment" few years back. Same thing almost happened to Sabertooth Games when they decided to end WH40K CCG (which was quite popular here). I think if it wasn't part of GW, we wouldn't have any their products for sale anymore. But let's go on to the retailers:
I have ordered from Tobias ->
www.chronopia-deutschland.de couple of times and everything has worked fine. I mail him the order and there it starts.
www.battlefield-berlin.de is also reliable place to order. I think twice I have ordered and have nothing to complain.
Main thing (along with customs) why I prefer ordering inside EU, is that payment can be done by bank transfer without any extra costs and one doesn't have to own credit card.
There's (at least) one more german shop which lists Chronopia & Warzone ->
www.morgenwelt.org But I can't really recommend it, because my first order there has yet to come.