In the world of supply and demand, when demand rises, prices follow suit, and when demand falls, prices fall too. Many products on the market are fungible. By that I mean that, among the same products of the same brand, they are indistinguishable from each other and the consumer doesn’t care much which he buys. One would think that rents would fall into the same category as other products, and be bound by the same market forces, but they aren’t. Just as there are differences in quality among brands, so there can be differences in the quality of a rental property.