The seller or the provider of the goods or services completes a sale in response to an acquisition, an appropriation or a request. There is a passing of title property of the item, and the settlement of a price. A seller agrees upon a price which he willingly gives ownership of the item. The seller, not the purchaser generally executes the sale and it is completed prior to the obligation of payment. A person who sells goods or service on behalf of the seller is known as salesman or saleswoman.