In Season 6, Episode 10: Aunt Bee on TV
Original Air Date—15 November 1965, Aunt Bea wins a slew of prizes on a TV show.
When she finds out that she has to sell the items to pay the taxes she announces that she kept the garbage disposal.
Then in Season 6, Episode 19: Lost and Found
Original Air Date—24 January 1966
Aunt Bea finds what she thought was a lost antique pin. After spending the insurance money she got for it. She feels like she has stolen from the insurance company, but Warren and Goober end up helping clear her conscience,
With the insurance proceeds Aunt Bea decides to buy a garbage disposal for the kitchen.
In the span of 9 episodes, the garbage disposal magically disappears from the kitchen. Where did it go?