Agreed that OP's post is somewhat nonsensical. How can one "absolutely destroy" a dealer who still makes the deal? Making deals is their business--that's the one thing they have to be competent at on the sell side. Maybe they want some troublesome customers to feel like the customer "won" but there is next to zero chance an average customer pulls the wool over their eyes or successfully strongarms a dealer. You'd have to set up some kind of situation like the one where Donald Trump stiffed a music store owner.