If you use David Hobbs Honda, you can negotiate everything in advance, have hard copies emailed to you, show up to sign and drive and then have them tell you that their salespeople are not supposed to make actual payment quotes. At that point, they tell you that the actual price is $800 higher and that you should understand that they simply made a mistake and that the only option is to take the higher price. When you threaten to file a better business bureau claim and begrudgingly take the higher offer (since you've already invested a lot of time in this), they don't budge. Then when you acutally file the claim, they offer to take the car back and void the entire transaction, so you get to start from scratch or just keep your higher payment.