Popular on Evreward since 2005, Hammacher Schlemmer offers coupons and cash back rebates, with savings as high as 80% off. Hammacher Schlemmer discount coupons are infrequent, only available a couple times per year. Even when Hammacher Schlemmer doesn't have a coupon, you can always get up to 15% cash back, and other great rewards, with every purchase.