It is unwise to pay too much, but it's worse to pay too little. When you pay too much, you lose a little money, but that is all. When you pay too little, you sometimes lose everything. 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 a good idea to add something for the risk you run, and if you do that, you will have enough to pay for something better.