I want to invest in mining, And I want your advice :

1- Would I buy this product or not :

http://www.ebay.com/itm/Bitcoin-Miner-7-TH-s-Two-KNC-Neptunes-2-EVGA-1200W-Platnum-Powersupply/171716807963?_trksid=p2047675.c100011.m1850&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D28773%26meid%3D0124c1fb3e9f4e9dba373b4fc9a34002%26pid%3D100011%26rk%3D1%26rkt%3D2%26sd%3D121590909668

And if the answer is no, How would you advise me about other products.


2- Or invested in mining Cloud.(And any companies advise me , and why)

Thank you