Wise words

[Duekster]

"There is hardly anything in the world that some man cannot make a little worse and sell a little cheaper, and the people who consider price only are this man's lawful prey.
It is unwise to pay too much, but it is even worse to pay too little. If you pay too much, you lose some money that is all. If you pay too little, however, you will sometimes lose everything, as the thing you bought cannot do the intended job.
The law of economy forbids obtaining something of high value for little money. If you accept the lowest bid, you must add something for the risk taken by you. And if you do so, you have enough money to pay for something of higher value."
John Ruskin (1819-1900)

[topsites]

Successful price shopping is a trade, time for money.

Because the rule you speak of unfortunately holds true of few businesses, but I do agree with it.
Sometimes a higher price means more quality, but there's no guarantee.
There can be as much if not more bs with a newer or shinier product, for sure.
So it boils down to selective shopping.