Miele/Gaggenau dealer recommendations

Try flamtech in chinatown. Very knowledgeable staff and prices same as online from my experience.

After rave reviews here a few years ago from people about DRIMMERS in Brooklyn and specifically singling out ISAAC (salesman) I bought my appliances from him there. Here's what I posted back then and I'm still very happy.
I bought Miele dishwasher, Liebherr fridge, Bertazzoni stove and other stuff. Prices were great and Isaac will match and beat any other legit one you find. While I used AJ Madison's site reviews to investigate data on various appliances, I did not purchase from them because the customer service reviews AFTER purchase were so frightening. Go on Yelp and you will see people's horror stories of damaged deliveries, non-response, etc. What Drimmer's explained is that Drimmer's itself owns its own trucking services and they take full responsibility. AJ Madison farms it out to 3rd parties and you're on your own.

And by the way, I never set foot in Drimmer's....everything was done with Isaac over the phone and email.

If you're doing a full kitchen reno, let your contractor handle it. He will probably get a better price than you, and will be responsible for it until the moment he hands it over to you and you sign off.