Verna Felton, who plays Mrs. Simpson, the housewife Lucy meets when going door to door trying to sell the vacuum cleaner, also appears as the maid in Lucy Hires a Maid (1953).
Right at the end, after Ricky admits to having bought a new refrigerator, Ethel complains that "nobody could sell old Fred anything." Fred says, "Come on down and see your Handy-Dandy washing machine!" But just 14 episodes later, in Never Do Business with Friends (1953), the Mertzes buy the Ricardos' old washing machine to replace theirs, which they say is very old and decrepit.
Out of the two-minute block of time he had, it took salesman Harry Martin 25 seconds to vacuum up the dirt he threw on Lucy's carpet.