CONVEYANCING – the contract and conditions of sale – deposit – vendor accepted guarantee for deposit – guarantee expired prior to completion of contract – whether obligation to pay deposit suspended until expiry of guarantee – whether purchasers remained subject to obligation to pay deposit – whether vendor entitled to terminate contract for failure to pay deposit EQUITY – equitable remedies – specific performance – whether purchasers’ conduct amounted to repudiation or abandonment of contract – whether purchasers are ready, willing and able to perform