Willie is furious when ALF reveals that he bought a satellite dish in the "Absolutely no refunds. What are you deaf? sale."
This is the name of the sale during which ALF purchases a satellite dish for the Tanner household (Episode: "Hide Away"). When ALF admits to Willie that he purchased a satellite dish, Willie insists that he return it immediately. ALF then informs Willie that he purchased the satellite dish during the "Absolutely no refunds. What are you deaf? sale." Willie increduously asks "absolutely no refunds?!" to which ALF promptly replies, "What are you deaf?'