IIRC it was around $6k. Can't remember the exact figure as I bought some other parts for my other merc as well so the bill was one lump sump $10k that time. Irregardless, I'm pretty sure stuttgart was the cheapest among others at that time for the aerokit. I was very lucky as they had stock in their shop,otherwise you'll have to wait for the monthly 'orders' from Germany as this not not a 'common' part so not many shops have them in stock.