"It is difficult to find something in the world, that some people not in a condition to make little bit worse and to sell little bit more cheaply, and there are the people who are considered only with by, - here they and become lawful extraction of the first. It is unreasonable to pay too much, but to pay too little even worse. When you pay too much, you lose a few money - and all. When you pay too little, you sometimes lose everything because the bought thing is unsuitable for for what you have bought it. The general rule of business balance does not allow to pay a little and to receive something - it it is impossible to make. If you choose the cheapest offer, you should consider risk of additional expenses. If you can make it, then you have a sufficient sum to buy something better."