It’s simply the case not everyone wants to screw you down on cost. Don’t assume they will. If you have every purchased a Mac when a pc is cheaper (or similar buying the brand when generic is cheaper) or paid more for the pizza from the restaurant you love, you’ll know what I mean.
In fact if the pizza place says “sorry delivery only due to COVID so pizzas are half price” I’d think “huh... what’s wrong with their pizza?”