For example, a furnished rental with very old, unsightly or just plain ugly furniture might not command much of a premium, if any, vs a comparable property that is unfurnished.
In fact, a furnished rental with terrible, unusable furniture might rent for less vs a comparable vacant unit if the landlord insists on the furniture remaining in place.
In this situation, the apartment might be extremely hard to rent out at all if the owner is unwilling to at least allow the tenant to store the ugly furniture somewhere, ideally in a storage unit or locker the owner might have in the building.
Pro Tip: You can easily check the price differentials for furnished vs unfurnished units in a condo building on any number of broker or 3rd party real estate search websites. You can even check out the quality of the furnishings between comparable listings and gauge what the premium for a furnished apartment in your building might be based on market prices.