I have brought on April  Avalon 200G with lowest price on that time 1300 usd plus 200 usd shiping plus 560 usd tax. so totally more than 2000 usd I have get back only about 1200 usd (lost about 800 usd) and now this one drops to 105 ghs and brings 40-50 usd per month with 400 watt on same time I have brought 860 ghs on pbmining sure I know what it is Risky its brings all money on it back plus some profit and yet they pay plus without noise and space usage , so clealry pbmining makes match more sense it continues to pay I have shut down my avalon 200g. On same time if You would brought from cex You will clrealy lost half of Your money minimum I was avoid this but monitor its price movment.