Hey !

I am planning to purchase bit-coin mining hardware which has the hash rate of 180gh/s.But I need some further details of the machine.

That
how this machine works?
Will there any downgrade in the speed of this machine in future?
for how many hours I can run this machine continuously?
What will be the power cost?
How to setup the machine?
how many days it will take me to mine 1BTC?

link from where I am planning to buy -

http://www.ebay.in/itm/Bitcoin-Miner-Sealed-New-One-Low-Very-Low-Price-180-GH-s-/121303879350?pt=IN_Laptop_Desktop_Accessories&hash=item1c3e464eb6&_uhb=1

Thanks
Danny