Windshield gasket replacement $$$$$ ?

I'm calling around for quotes on replacing the gasket for my windshield on my 74 Duster. I am getting quotes for $250.00 and more and I need to supply the gasket. Does this seem high? I really was thinking "hoping" for $150 range maybe it's been that long since I have had to have this done to any of my cars also if they break it, it's on me to replace the windshield. any input on prices or recommended places around Eastern Pennsylvania would be great.