Achei curioso esta deixa.....está em inglês mas percebe-se bem...
"It's unwise to pay too much, but it's also unwise to pay too little. When you pay too much you lose a little money – that’s all.
When you pay too little, you sometimes lose everything, because the thing you bought was incapable of doing the thing you bought it to do.
The common law of business balance prohibits paying a little and getting a lot. It can't be done. If you buy the cheapest, it's well to add something for the risk you take. And if you do that, you will have enough money to pay for something better"
John Ruskin (1819 - 1900).