If The Customer Beats You Up On Price, Will You Do A Worse Job?

This question prompted from a comment in the stolen DVR statistics report:

Sometimes the customer sees the quote and thinks, "I'll just demand for another $50 off. I know this installer won't walk away over $50 when I'm paying him a $1000. He won't let that hour he's spent here go to waste over just $50. Every little bit I can get off is less money I have to pay." Then the installer says to himself "Ok, you want to nickle and dime me down for $50 measly bucks more. That's fine, I just won't install that lock box for the DVR I normally include."

So what do you think? In such situations what do you do? Walk away? Eat the reduced profit? Cut corners?

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