I was fortunate, Brandon. Didn't have to negotiate at all. The dealership here in Austin where I got the truck claims to be a no-haggling dealership and that their advertised price is as low as they can go. Not sure that's the case in every situation though.
The Longhorn that I bought was originally advertised on their website at $52,386. MSRP was $63,565. That was a 17.5% discount. And then the advertised price was lowered to $51,936, and I decided to buy the truck. Tried (halfheartedly) to get them to come off another $500 but they wouldn't budge.
At that price, it was more than an 18% percent discount off of MSRP, and the truck had what I wanted and didn't have stuff that I didn't want like the sunroof. So I pulled the trigger - $51,936 before tax, title, and license. I was/am pleased with the purchase.
I haven't been checking their website lately so I'm not sure what they're offering now.