Adversarial purchasing

Adversarial purchasing is when someone tries to buy something for less money than what it is worth, usually by bargaining. It's a lot like a game - the seller sets a price, and then the buyer tries to get them to lower it. They do this by carefully considering the seller's offer and looking for ways to get a better deal. This can take a lot of patience and perseverance, but if they are successful they can save money.