This is what I sometimes quote to my customers, and what I keep telling my sales staff. A friend of mine had this actually printed on the back of his business card:
THE LOWEST BIDDER
It’s unwise to pay too much, but it’s worse to pay too little. When you pay too much, you lose a little money – that is all. When you pay too little, you sometimes lose everything, because the thing you bought was incapable of doing the job it was bought to do. The common law of business balance prohibits paying a little and getting a lot – it can’t be done. If you deal with the lowest bidder, it is well to add something for the risk you run, and, if you do that, you will have enough to pay for something better.
JOHN RUSKIN, Author-Economist (Feb. 8, 1819 – Jan. 20, 1900)