Another tactic may be to go back to the dealer with a check already made out for the total amount you are willing to pay including all taxes, license fees, etc ... and say that this is the total amount that you are willing to pay and then ask for the keys ... I just used this tactic to purchase a Saturn for my Daughter.
Michael
---
Pewter Hummer H2
Northern California
www.zootsuitstore.com
------------------------------------