I am not sure the approximate cost of the windows because my father hired these guys, but I am here to let everyone know what is going on with my windows. My father had the windows replaced approx. 5 years ago. At least 2 of the 6 windows are leaking. One of them is especially bad and has caused significant water damage. They did not extend the flashing out far enough and over enough. I can stick 2 fingers into the hole into the corner - see the pic below. Water and snow collect onto the exterior ledge and leak right into the house. Unfortunately, I had the couch pressed up against the wall and didn't notice it until it was too late. Do yourself a favour and pay a little more and get the job done right.