vehicle

class Vehicle:
    def __init__(self, type, model, price, owner=None):
        self.type = type
        self.model = model
        self.price = price
        self.owner = owner

    def buy(self, money, owner):
        if not self.owner:
            if money >= self.price:
                self.owner = owner
                print(f"Successfully bought a {self.type}. Change: {money-self.price:.2f}")
            else:
                print("Sorry, not enough money")
        else:
            print("Car already sold")

    def sell(self):
        if self.owner:
            self.owner = None
        else:
            print("Vehicle has no owner")

    def __repr__(self):
        if self.owner:
            return f"{self.model} {self.type} is owned by: {self.owner}"
        else:
            return f"{self.model} {self.type} is on sale: {self.price}"