Macy's offers the TonyMoly I'm Real Facial Sheet Mask in several varieties (Lotus pictured) for $3 with free shipping. That's the lowest price we could find by a buck, although other high-end retailers charge at least $8 to ship individual masks. Made by a top Korean beauty brand, these masks offer a variety of benefits to the skin, such as nourishing, soothing, purifying, or brightening.

Stocking up? This 5-piece set is available for $12 with free shipping. It includes one mask each in Rose, Cactus, Pearl, Green Tea, and Lotus.