Chris -
If the 15 holes you refer to are the same price as the 8 holes I bought, that's a shocking 56% increase - 39% unit price + 12% depreciation in the Euro since I bought mine, which they are not passing to the consumer.
BTW, I always liked the pre-15 hole 'Bundt' style wheels on my 1983 300SD, but they were 14" and did look a little small on the car.
No longer a bargain.