If the $870 was $870USD it would be a steal and I'd suggest you jump on it. Since it's in Euro it's not as good a deal and the equivalent to the Alfine [ie. able to take discs] is closer to 1000 euros. I'm not clear what the final cost would be once you get refunded VAT and pay shipping, duty and sales taxes at your destination.

Speed Goat is selling a Rohloff for $1500USD.

Once you start getting to 3 x the cost most people would probably be served just fine by an Alfine 11. If you are an extremely high mileage rider or going to Mongolia I'd stick with the Rohloff. Different horses for different courses.

You'll get 100,000kms+ out of a properly maintained Rohloff. We have no idea what the long term will be for an Alfine 11....there isn't a production unit out there with more than a few thousand kms at this early stage. Shimano is not known for their long term durability. They seem to make parts that work well for a reasonable amount of time and then need replacing...nothing wrong with that really given how little 90% of bikes actually get ridden.