A lease is a contract between landlord and tenant.  A valid contract requires an offer and an acceptance which occurred.  If you did not know and had no reason to know of the mistake in the price, you have a valid contract and can enforce the contract at the stated price.In addition, since the contract required the owner to confirm the reservation and send you the e-mail confirmation which the owner did, you have a valid, enforceable contract at the stated price.  You can sue the owner for breach of contract.You can recover damages (monetary compensation) in your lawsuit for breach of contract.  An alternative would be the equitable remedy of specific perfomance which would require the owner to comply with the terms of the contract.