Because of the time I spent in the car business, whenever a friend or relative needs a car, they of course call me.
My friend wanted a Toyota Matrix with ABS but without the xR package--a rare combination. It took about 2 hours on the phone to find one. Despite the rarity of the vehicle, when I got the sales manager on the phone, I told him who I was and what I was doing and asked him for a price. He immediately agreed to $100 over invoice, a very fair price.
The delivery process went smoothly, and they detailed the car and filled it with gas (some dealerships will forgo these services if the price is very low). Overall a great experience.