In the price of buying and selling, it is naturally allowed to the contracting parties to overreach each other.

Explanation

(English-origin maxim.) In arm's-length bargaining over price, each party is naturally permitted to seek the best deal — the law does not police hard bargaining absent fraud or duress.

Where this applies

• A car dealer offers a trade-in price of $3,000 for a car worth $5,000 and sells the same car for $8,000 — both buyer and seller were trying to get the best deal, and that is lawful bargaining.
• A homeowner negotiates aggressively to buy the lot next door at well below market value, and the seller holds out for top dollar — both are within their rights.
• A wholesale buyer haggles a farmer down to the lowest possible price for a crop, and the farmer tries to get every penny he can — hard bargaining without fraud is perfectly legal.