What is the Meaning of the Expression
YOU’VE GOT A DEAL?
If someone tells you, “You’ve got a deal,” it means that they agree with the exchange that you proposed. They will do what you are asking them to do, and you agree to do what you said you would do.
1. Imagine you want to buy a used car. You see a car advertised online in your city. You go to look at the car. You test drive it. You want to buy it, but you know that the car will require about $200 worth of work soon. The seller is asking $3500. You mention the mechanical work that needs to be done and ask the seller if he would be willing to reduce the price by $200. He recognizes that what your request is reasonable. He smiles, puts out his hand to shake yours, and says, “Okay, you’ve got a deal.”
The handshake is a physical sign that you have both agreed to the discussed arrangement. To shake on it is an informal confirmation of an agreement. It is viewed as an informal contract of trust.