One rule of thumb used to determine fixture or personal property is if removed will it leave a void. (Built in oven, cabinets and sheds on a cement pad).
The best thing to do is make sure that they are excluded on the listing sheet, and brochoures in the house, ads on line and on the contract if you are the seller and make sure that you include them on the contract if you are the buyer.
The proper approach is to assure that items conveyance is clarified in the Offer/Contract.
There should be no assumption that they stay or go.
If a Buyer wants them, the Buyer asks for them.
If the Seller wants them, the Seller excludes them from the listing agreement and from the final Contract.