eh? go to Edmunds.com, find out the invoice price (including invoice of options). Dealers never pay invoice anyway. Find out if there any manufacturers incentives and subtract that from the invoice price. Then go into the dealership and offer $1.5-2k below that and ask them to waive any dealer/transport "fees." Get their counter offer and call it into another dealership. Play them against each other until you get the price you want. I do that over the phone with great results. It's so much better than going into the dealership since you can simply hang up anytime if you want. I've never paid more than $1k below invoice (Honda, Toyota and Subaru)...though I guess that only works with non-luxury cars. A BMW/Lexus dealer would probably smile and tell me, "good luck...bye now."
oh...and if they want to put a sticker or some sort of dealer name and address on the back of your car, ask for another $100 off for the free advertising they're getting...otherwise, make them remove it.