In 2006, less than 7 percent of prescription drugs were purchased by mail order, according to the National Association of Chain Drug Stores. But did you know that larger health plans will offer 3 months of prescriptions for the co-pay price of two? In a year, that’s a $200 savings. “You would likely take advantage of a ‘Buy Two, Get One Free’ deal at a department store or grocery store, so why not do it with your prescriptions, as well?” says Tracey Baker, author of Navigating Your Health Benefits For Dummies. Sites like express-scripts.com and www.caremark.com specialize in mail-order and home delivery prescription services.