But any personal property that is not nailed down (chattel) is negotiable. This most often involves appliances that are not built in (washer, dryer, refrigerator, for example), although some sellers will be interested in negotiating for other items, such as the baby grand-piano.
Most experienced REALTORS avoid the inclusion of chattel in the real estate contract itself. Very often you may lose a contract for the house while haggling over the value of a dining room set. It's far better to make separate deals, in writing, for personal items after the purchase contract for the home is executed.