I am wondering what the average public thinks of parts mark up. Lets say I have a 95 Mustang in my shop, needs an egr valve. I can get it aftermarket costing me 45 dollars (and not from the professionals at auto zone). What should the customer be charged. Keep in mind they can get the part from autozone for 42 dollars. It calls for 1.5 hours to replace, what is a fair labor charge.