What is considered an AWESOME deal for a new 2008 Chevy Tahoe?

[Trying for Baby #2]

Okay,
I am interested in a new 2008 Chevy Tahoe LTZ 2WD. It is fully loaded (Navigation, DVD, the works)

The vehicle price is $50,000 but they are having a Red tag sale saying I pay only $40,000. Although this sounds pretty good...I just think it could go lower.
My question is: I hate buyers remorse....so, how much LOWER can I haggle??
What is the dirt cheapest I could offer and they'd go for it?
Does anyone know if this redtag sale is their bottom line?
People with car sales experience...Please help!!
10 points to best answer!!! :)

Thanks a bunch!
Mdcbert, I am not a sucker nor a fool. I need a bigger car for my expanding family and I'd rather drive a bitchen gas guzzler than a mini van.
The money I pay for in gas really isn't an issue, and actually wasn't even my question. But thanks for your useless answer.

[Rikitikitavi]

you can do better. The Tahoes are not selling. Shop around using search engines like Cars.com, etc. You should be able to get one for about 32k-35k. Theyre really soft on the market right now

[mdcbert]

10,000 off is pretty good. The car dealers are trying to dump thousands of unwanted SUV`s to any sucker that is foolish enough to buy one now.

I guess you think gas prices are going to stay low?

[Mike A]

This really depends on where you live. The average buyer in a suburb/city area will take the 'deal' without a second guess. If you live down south like me, there is a steady supply of buyers for these vehicles.

For example, in Texas you can't get a dealer to come down off a price for almost any vehicle with an engine above 6 liters. The demand is still there for those trucks. I know the suburban is standard with a 5.3, but this is just an example. If it has the smaller engine, you will have a better chance at offering a lower price. Find a dealer in the area offering a very close or similar price for one with a bigger engine - use this print-off for your bargaining purposes if you can.

Knowing this, be smart about it. You know if you live in a big city the deal will be gone soon by demand. If you live in the country you can afford to ask lower, like 35,000. This is why I say it depends. Also, if you spread 5 grand out for 4 years of financing, it really isn't that much extra per month (and if it is, this vehicle shouldn't be purchased).