Originally Posted by cmhsam
Don't negotiate a payment. The residual will stay consistent, since its based off MSRP. Negotiate the selling price and MF. There is no shortage of M5's. You have a lot of options for dealers to choose from.
^ This. Also, don't put a down payment (cap cost reduction) if you can swing it - rather, go wit the multiple security deposits. BMWFS holds your $, but you get it back when you turn in the car.