(e.g., "Upgraded to a larger model") to reassure buyers there isn't a hidden problem.
List a fair price based on similar local listings. Adding "OBO" (Or Best Offer) can encourage more interest.
To sell your old refrigerator quickly and for the best price, you need a listing that builds immediate trust and answers all potential buyer questions upfront.
List H x W x D to save yourself from endless "will it fit?" messages.