Ebay discount code
https://www.storeboard.com/blogs/general/how-the-10-worst-ebay-coupon-15-off-fails-of-all-time-could-have-been-prevented/1488619
Most stores do have a limit on the number of of particular sale products you should purchase. When you have reached your limit and still have further Discount coupons you can trade with other coupon buyers or listing