When I bought my condo, it had a fridge, stove and dishwasher in various states of advancing age.
Budgetary considerations did not permit immediate replacement. However, when the fridge woke me up one night with a profound gurgling sigh like a dying sheep, followed by expelling a puddle on the floor, I replaced it with a more energy efficient unit.
The stove, which burns so much power that the utility company sends me Christmas cards, will be the next to go.