You can buy 6 MSI Armor GTX 1070 for $2600 NEW. So you'll probably want to adjust your price or you'll be "bumping" this thread for eternity 
So free aluminum frame.
Free 1200 watt psu
Free mobo
Free stick of ram
And he mentions obo
Which means or best offer.
So the question is how low is best offer that he takes.
I posted that a month ago. Now they are priced at $399 so its $2400 in GPU's. I think he was asking like 4500 before, so its good he came down I guess.
https://www.newegg.com/Product/Product.aspx?Item=N82E16814127951
As mentioned by phil this is not just 6GPU's. While in your world the mobo, frame, memory, PSU, and Risers may be free in this one they are not. and also as stated it is OBO.
