Figure out the lowest price they can sell at, add $100 to that, walk out if they say no.
If you really want the car, add another $100. Still no, stand up and walk out. Really, you can live without the SUV.
Tell them you will discuss financing LATER. You have the total amount in cash [right?] so you can decide whether the financing deal they offer is better than a CD or T-bills.
If you don't have cash [stupid] get financing BEFORE you negotiate - talk to your credit union or LOCAL bank first.
How many times does this simple info have to be shared?
Oh, new Internet twist: do it all online.
Do not buy the floor mats and rustproofing.