A valid contract is a legally binding agreement between two or more parties that can be enforced by the court. To be considered valid, a contract must include the following elements: a clear offer and acceptance, consideration given by each party, legal capacity of the parties, legality of the agreement, and mutual assent. The fact that the agreement was made over text does not affect the validity of the contract. To compel a sale the offeror could seek equitable relief through the court. Alternatively, if a valid contract exists, a party can also seek damages to compensate for any losses suffered as a result of the other party's breach of contract, which aims to put them in the same position they would have been in had the contract been fulfilled. I would recommend speaking with an attorney as soon as possible. * The foregoing information is general advice only and should not be relied upon to take, or fail to take, legal action. No attorney-client relationship is formed by this information. *