Tracked by Evreward since 2010, Darphin offers coupons, cash back rebates and rewards, with savings as high as $75 off. Darphin discount coupons are seasonal, appearing every three to four months, and are often more valuable than similar merchants. Even when Darphin doesn't have a coupon, you can always get up to 18% cash back, and other great rewards, with every purchase.