Got a personalized email offering purchase miles with 20% off for 2K-4K miles, 30% off for 5K-19K miles and 40% off for 20K or more. So 100K one can buy for $2257.50.

Taking into consideration that business class round trip ticket from US to Europe would cost more (correct me if I am wrong) it seems that the deal would make sense from the monetary prospective - buy miles and then buy award ticket. Obviously in this case you won't have accrued miles from the trip.