Popular on Evreward since 2005, Hammacher Schlemmer offers coupons, cash back rebates and rewards, with savings as high as 80% off. Hammacher Schlemmer discount coupons are somehwat rare, available a few times each 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.