Check the washer tub and the dryer drum for rust, which can snag and ruin clothes.
Open the washer door; a moldy or mildew scent can be hard to remove, especially in front-loaders.
Check rubber hoses for cracks or bulges. Budget an extra $20 to replace them with stainless steel braided hoses for safety. Price & Value Expectations Dryers | New & Certified Refurbished Appliances