I agree. You're not negotiating fees and taxes, as those are usually set in stone unless they're trying to rip you off with unnecessary fees (window etching, $300 doc fees, etc...). We know what MSRP is, we have a general idea of what invoice is using online info from Edmunds and that should be all you need to approach multiple dealers with offers. I don't like beating around the bush and making the dealer do math. I make my offer, purposely low-ball them a little bit and go from there. If they give you a number in the ball park and won't budge, go to another dealer with that number and ask them if they can beat it. If you can do this with two or more dealers, I guarantee you will have at least one of them eating at out of your hand. One of the dealers I was working with nearly two months ago over the phone with pricing is still calling and emailing me to this day. I really need to answer the call one day and tell them I bought from another dealer, but I'm kinda curious as to how long they're going to keep it up.