Let’s face it: cosmetic procedures aren't cheap. According to the American Society for Aesthetic Plastic Surgery, the national average cost (in 2011) for laser skin resurfacing was about $1,200 and a single dose of an injectable dermal filler was close to $600. So when you see advertisements for discounted treatments, it’s understandably tempting. But before you sign up for a so-called bargain, it pays to do a little research.