Amazon Warehouse Deals

In the meantime I have only experiences with the purchase of books on Amazon Warehouse Deals, which are returned for example by other buyers. Amazon is offering them again with high percentage discounts and they also write down if there is any problem with the goods. In the same way Amazon offers many different kind of goods, which can be bought for a favourable prices. They are ofte marked as B-Ware etc. Before I thought of them as defective products, but it works like this: 

Amazone´ll receive the once sold goods back, they´ll check if the product is still functioning properly and avaluate the state of the product and at the end the product will be offered on Amazon again for a very low price as Warehouse Deal...