One way to furnish a living room is with modular furniture  Instead of buying a standard sofa, for example, one can buy a left end, a right end, and a middle piece that can be combined to create an L-shaped sofa  Modular furniture, however, is far more expensive than standard furniture
On average, a three-piece modular sofa costs almost twice as much as a standard sofa of comparable size and quality
The consumer demand for sofas sometimes increases more quickly than the supply.