When I started in sales way back in 1983 I was told this ... " Take as much profit out of a deal as you can when you sell a car , so when they return with any problems you simply smile and put them right !" How true is that ? If you don't make profit you can't look after them - , Doesn't matter how little you've made the customer always thinks you're still making thousands anyway .. so you might as well make thousands and if they have a problem .. smile, look after them .which in turns makes them happy, repeats, recommendations ! { Was trying to attach an image but failed, failed, failed )