IKJ, forget about it my friend. The fact is that the car is in your drive way. I've had people come up to me after we had just acquired a new car and asked me how much it was worth. Being brought up the way I was, I chose not to disclose the price - only to have the other person tell me that he saw the same car or a similar car at a ridiculously lower price at some local dealer in Karachi.
So like I said, he who knows the car, knows it is much, much, above 2.1 million. For those who don't, they can continue to say whatever they want, just don't bother about it.
Back to the accessories: yes, the wheels and rear spoiler are all you need. Did I read something about fender vents as well? You should give those a thought too, although I'm not sure how well the finishing would be, even if Dewan installed it themselves. Secondly, the prices are actually realistic, but to be honest, anyone buying genuine accessories would think twice, so its only fair if you say the price is 'high'. I am going to be in Dubai in November, Inshallah, and will be searching for a nice set of wheels for the E90, as the wheels being sold by Juni wouldn't look nice on a sedan, but would suit your coupe perfectly! Best of luck for the deal.