A thief posing as a buyer drove off in a car.
A black Volkswagen Golf R32, registration GX06ONG, was stolen after the man visited an address in Nazeing.
Police have not released a description of the thief or provided further details of the circumstances in which it was taken.
A blue Ford Fiesta, registration EN59 EGF, was also taken from a property in Roundhills, Waltham Abbey.
Anyone who sees the vehicles can call police on 101.