I would say haggling is similar but fundamentally different, that's more between a customer and a salesperson and usually involves more or less them on equal fo

I would say haggling is similar but fundamentally different, that's more between a customer and a salesperson and usually involves more or less them on equal footing (the example that comes to mind first is a car, and the old saying that no one but a sucker pays sticker price). That's a luxury good where the need isn't immediate and the customer can exert some influence, unlike the vast majority of sales situations where the need is apparent and they can't just go to the 'next lot' whatever that might be.