Up to date world depends on market relations between customer and seller. There are many factors, which control selling various things. One of the most specious parameter is price.
There are some benefits of buying cheap products on the marker. In the beginning, people who consider price as the most important thing to think about will have economy their money on more important things. This is basis of finance grammar, buying product what you want with the lowest price; for instance, the girlfriend really desire new model of phone, but the boyfriend wait sales on this model for save a little bit money. This example depict rational mind of finance, because saves means earned. There are many services with discounts on every category of products like gadgets, clothes, shoes, furniture etc. I think everyone must be learned to use the Internet to buy everything with the lowest price on the market.
In the other hand, sometimes humans forget about dangerous of low-cost things, whereas many companies create unsafe commodities for earning much money on it. However, budget items do not guarantee quality; for example, man buy new low-price laptop and it is used with a superb conditions only for 2 years. Meanwhile, he could buy medium or high priced laptop, that would be work more longer than low-cost.
In light of this evidence, it is crystal clear that the medium or high quality of products better than low-cost and everybody can buy all of this with lower price in sales days like Black Friday.