Serta Armless Convertible Sofa $103

If your living room needs a sofa that works harder without taking up more space, the Serta Calgiri is worth a serious look. This 66-inch, three-seater convertible tuxedo sofa is built on a tough hardwood frame with sturdy metal legs, and the high-density foam cushions deliver the kind of support you'd expect from a brand like Serta. The armless design keeps things sleek and flexible. Right now it's marked down 48% at Home Depot, from $199 to $102.68.