Here are prices from group buy that has been done early this year :
NC500 - 90 EUR
NC122MP - 112 EUR
NC252MP - 157 EUR
NC502MP - 251 EUR
NC1200 - 275 EUR
NC2k - 395 EUR
These are cheap in terms $ per Watt, so they must cut costs somewhere.
For me the stranger things are companies that putting oem modul into chassis and selling it 5x and more that price. And after that you have to pay 500E for recap with caps that will last longer. How much time it takes: 4 hours for first unit and then I won`t believe that normally it takes more that 2 hours with proper equipment.