What is a fair price to offer the car dealership for this used SUV?

My husband and I went minivan/SUV hunting today with a budget of $20,500. We told the salesman our budget was only $19,000-19,500. The one we decided on is a 2003 GMC Envoy XL Sport Utility 4wd, with lots of extras. He then sat us down, and showed us a paper he printed out on this vehicle, stating the price of the vehicle, which was $18,889 and included taxes, taxes, and $399 for sales commission (yes, it actually says that). The total was around $19,800. I checked the Kelly Blue Book value with all the options our vehicle had and they value the car at $18,985. Now, this car is in pristine condition with low mileage for the year (like 43,000 miles). What do you think a fair price would be for us to offer? Will the salesman get more than just the $399 stated on the paper? It is at a Marine Chevrolet dealership in case you are wondering. We want to get the SUV tomorrow, so any answers will be appreciated. Thanks for answering!!
I am not trading in a vehicle for this one - this is going to be a second vehicle. My zip is 28546. The SUV has a 4.2 liter engine, 6 cylinder, 4 wd automatic, with a/c, pwr steer, pwr windows, pwr door locks, tilt wheel, cruise control, am/fm, dual front air bags, abs 4-wheel, roof rack, privacy glass, SLT (whatever that is), rear air, multi disc cd plyr, premium sound, front side air bags, leather interior, dual pwr seats, sun/moon roof, running boards, premium wheels, and OnStar. I am already preapproved by my bank, so I will be going in tomorrow with a check for alot more than the price of this vehicle that was given to me (but HE won't know that, hahaha).

those SUVs are tough to sell these days.....because of the gas mileage that they get. Offer him $18,000 out the door....he is not going to get too many buyers for it!

I sell used cars for a large Chevrolet dealer. It does not really matter how low the miles are. The vehicle is already 5 years old. Think of it this way, If you finance it for the traditional 60 months (5 years) Your car will be 10 years old when your loan matures.

Basically, It does not really matter what Kelly Blue book says, that is just a guide, Kelly Blue book does not write you a check or buy the vehicles.

Basically, at best, you are looking at about a $17,000 vehicle, we would sell these all day long at $16,900 or $15,900 on our lot.

If he sold you the vehicle for the $18,985, basically all said and done, your salesman just made what is called a "4 pounder" which = about a $1,000 commission to him.

Hope this helps