A breach which would operate as a discharge of a contract1 will operate as a discharge of a contract not to revoke an offer.2 If a lease contains an option upon the property leased, and the lessee refuses to accept the lease for reasons other than the act or fault of the lessor, the lessee can not, by accepting such option, make a binding contract.3 If A makes an offer for value to B for the sale of certain property, B's rights are prior to the rights of X, who attempts to purchase such property from A with notice of A's offer to B.4 Accordingly, it has been held that A's sale of such property to X is not such a discharge of A's contract with B to keep such offer open, as to enable B to refuse to pay to A the amount which he had agreed to pay for such offer.5