KOBSTER Coupon Codes, Vouchers, Discounts and Promo Codes for May 2018. Use these coupons to save big on KOBSTER. All codes listed on this page are frequently checked for validity and are free for use. Simply click on 'Use This Coupon' and shop from the store website. The discount will be calculated on applying the coupon on CheckOut page. In case of deals & offers, the discount will reflect in the cart automatically.