Customer: "Can you quote me for two HP DC7700 and the other bits we discussed?"
Me: "Sure no problem, the 7700's are £145.00 each by the way."
Customer: "Ooh that price is really good, I might take nine instead. How much for nine, is there a discount?"
Hang on a sec, because it's such a good price you want seven extra but you want them even cheaper still? tell you what, just buy the two at the fair price I'm selling them at.