Question: the sale of real estate is covered by the common law of contracts

Answer: Yes, As may be the case with other contracts, real estate contracts may be formed by one party making an offer and another party accepting the offer. To be enforceable, the offers and acceptances must be in writing (Statute of Frauds, Common Law)and signed by the parties agreeing to the contract. Often, the party making the offer prepares a written real estate contract, signs it, and transmits it to the other party who would accept the offer by signing the contract. As with all other types of legal offers, the other party may accept the offer, reject it (in which case the offer is terminated), make a counteroffer (in which case the original offer is terminated), or not respond to the offer (in which case the offer terminates by the expiration date in it). Before the offer (or counteroffer) is accepted, the offering (or countering) party can withdraw it. A counteroffer may be countered with yet another offer, and a counteroffering process may go on indefinitely between the parties.