What is the difference between a sale and an agreement to sell and give examples?

A sale is a completed transaction where ownership of goods is transferred from the seller to the buyer immediately upon payment, such as purchasing a car at a dealership. In contrast, an agreement to sell is a contract in which the seller agrees to transfer ownership at a future date or under specific conditions, like a buyer agreeing to purchase a house after certain inspections are completed. Thus, the key difference lies in the immediacy of the transfer of ownership.