How Much is my 1997 Firebird worth?

I have a 1997 Pontiac Firebird with the W68 Appearance package and the Y87 Performance package. Its white. It has a 3.8 with an Auto Tranny. Also it has T-Tops and a gray cloth interior. The motor has around 150,000 miles on it. I want to know how much I can actually get out of this car.