You get what you pay for. This is why it is important to read reviews on products before making high end purchases. At times, you can find quality products at reasonable prices. But for the most part I have found that when something is cheaper in price it is also cheaper in quality. This is not to say that expensive things are superior. There have been times I have bought things and wasted my money. This is why it is imperative to read reviews and also to comparison shop!
I agree and would add that always going for the lowest end product can leave you wanting to upgrade sooner anyhow, so it's false economy in the end.