[arbingsam]

They open and repack everything. Amazon requires a specific Amazon barcode, you can either pay them to do it for you for 20c an item or pay someone else to do it. I found I could get the item quality checked and barcoded for the same price as Amazon would do it.

[bambax]

Great answer, thanks! So quality check is 100%? And what is the defect rate? What happens when a defective product is found?