Say goodbye to dead, dull skin and hello to radiant, smooth skin with the PMD, or Personal Microderm System. The handy device helps to slough away dead skin and minimize the appearance of fine lines and wrinkles, and is available from the vast inventory on eBay. Sometimes the skin's natural exfoliation process needs a boost, and the PMD delivers just that. The system included discs that contain aluminum oxide crystals, which help to gently slough away dead skin cells on the epidermis, or the outermost layer of the skin. This form of exfoliation, known as microdermabrasion, is less invasive than others, such as chemical peels, which go deeper than the epidermis. Microdermabrasion is also known to be an effective method for treating acne scars and hyperpigmentation caused by sun damage. Many systems come with a variety of discs, enabling you to choose your level of exfoliation, done from the comfort of your own home.