Missing parts! 
#5 which consists of 2 parts. 
The 2 pieces which are the backbone of the book case. 
If you are going to resell open box items that are non returnable… the least you can do is make sure all the parts are included. 
If you don’t check returned items for missing items , but you turn around resell, then it’s a scam on your part. 

A scam just to sell defective items with no accountability. 
Your quality control and Management need to do better.