ALL SALES FINAL due to the nature of the business, however all units are guaranteed working as advertised and repair or replacement will be issued in the event of any issue reported within 7 days. Units are marginally clean; there may be some dust stuck to the thermal grease oil residue that seeps back through onto the other side of the hashboard, and some of the plastic sides may be warped, but the units are 100% functional. There are two different batches with two different FW versions, one of which does not create a blinking green indicator light while hashing. The FW can be easily upgraded, however to produce the blinking light and/or gain custom fan speed control depending which version you use. The item “Bitmain Antminer S5 with Corsair 750W Power supply” is in sale since Monday, April 25, 2016. This item is in the category “Coins & Paper Money\Virtual Currency\Miners”. The seller is “qtippio” and is located in Wenatchee, Washington. This item can be shipped worldwide.