Buying game movies for the nth time

I'm very lucky with this batch. The integrity of the products is very high. Most people have kept it very well. I opened the box and tried it immediately after it arrived. No problem. I will continue to repurchase. However, sometimes I encounter the situation where the discount coupons are used and the seller does not have the goods, which will cause the discount coupons to be wasted. It is more troublesome. Otherwise, it is difficult to find the shortcomings