You wanna look at product and then it's price, if it's worthy of price, you purchase the product.
To a truly wealthy person, price means nothing to them. Even myself, of recent I do not pay much attention to price but quality. I know the country I am residing, and I also know the city I leave in. I know the average cost of living in the city. I know the price to lounge in a hotel, I know the cost of food and even the cost of clothing. If the costs of things in a particular city is very far below your income, you will not mind the price because no matter how the vendor will inflate the price, it will not affect your purchasing power.
This is the formula that rich people use and that is why they are mostly unbothered about the price of products.