I have received 6xS1 Antminers yesterday.
2 Out of 6 of these Antminers was not working properly!
Their Fan was not working and when I opened their Fan I understood that they are for sure Second Hand, The Radiator behind Fan was full of dust and it certainly show that Bitmain is selling his worked S1 Antminers to market!
It is not a good way of business!!!

This is a picture of My Dusty second hand, received S1 Antminer:



For more quality picture visit here:

http://forgeco.in/images/Second_Hand_S1.jpg