The price of things is not as important as the things themselves. If promotions drive your decision making, then you’re a victim, not a player. What seems like freedom is bondage.
“Think of all the money you’ll save!” screams the advert. You have to resist that notion by summoning a quieter voice that reminds you how much more money you’ll save if you don’t buy anything at all.
As pastimes go, recreational shopping is a relatively expensive one, with few ancillary benefits. If you buy something you don’t immediately need, then you have to store it and find it again. For some people, that is a nearly impossible task. The fact that the purchase was totally unnecessary and driven by a general feeling of emptiness only make the situation more demoralizing.
So we might as well do what we really want to do with our time and resources, price be damned.