Help with leasing 2016 328i

Would highly appreciate hackrs input
I am trying to lease 2016 328i by end of this month. The listed price for this car with all the options is 52870. The price offered by dealer by email is 47950 ( same is mentioned in their site too). What would be the reasonable price I can quote?
I am planning to lease for 36 months 15k/yr and plan to use 7 msds. My credit score is around 710. My wifes score is even better. Any input is appreciated. thank you.
ps. I live near to boston .

At least 20% off, would mean your offer should be 42k. Target a payment of under 300 for this with msd.