I know this may be a long shot, but it may also help.
I have also been looking at an M3 recently, and the dealer wants 73.5k for the car.
I found out about this program that Costco has through which its members can receive large discounts. I don't know whether you're a costco member or not, which is why this may be a long shot.
I got in touch with a different dealership than the one I had visited before which works alongside with Costco in giving these discounts to their customers, and I was offered an M3 with the exact same options at the price of 69k.
Don't know if this helps, just putting it out there as an option.
2007 E92 335i--SG, Fully loaded, minus the dead weight..err..iDrive and Active Steering.