What kind of contract describes the property, states the amount of commission to be paid, states an expiration date, and is signed by the seller

An offer to purchase is a proposal made by a buyer to buy a property under specified terms. It outlines the buyer's intent but does not include the seller's commission details or an expiration date, as it is not an agreement initiated by the seller.

A contract to sell is an agreement between a buyer and a seller that details the terms of the sale once an offer is accepted. While it may outline specifics of the transaction, it does not focus on the commission or include an expiration date from the seller's perspective, making it distinct from a listing contract.

An option agreement provides a potential buyer the exclusive right to purchase a property at a specified price within a certain time frame. While it may have an expiration date, it does not detail the commission to be paid or the specific property listing, which are key components of a listing contract.