From what I've seen, M3/4 have been selling like hotcakes over the past month in my area. My dealer sold all of its DCT M3s from inventory and only has a few manual ones left.
That said, at this point in the year, you should easily be getting some sort of discount off MSRP especially since we're very late into the model year and MY 2016 is around the corner.
With a trade-in of $45k, you're also getting a credit for HST so really, you're trade in is worth $45k x 1.13 = $50,850 - a $1,150 "discount" (far from the $7k).
I'd put you in touch with my sales advisor but I see you're from Toronto
