Just a heads up, I received a scam message from a newly created user with a similar looking name ("kilol7", with a lowercase L instead of the 1 in the OP's name ["kilo17"]) about this. Of course this doesn't reflect on the OP, but please use caution if you get a similar message. Here's a copy for reference:
I would be interested at 7 BTC for 7 cubes and 2 controllers.. 15 BTC for 550Mh currently will most likely never earn a return, even at ~$0.08 or less per kwh.
https://bitcointalk.org/index.php?topic=934050.20Hi,
Had to have a long hard think about this offer is at was significantly lower than I was hoping to get.
On refelection taking in to account the current crypto market I think your offer is a fair one and I am willing to accept it.
Total for 7 cubes - 7
BTCPayment address : 1EzSiX8842yeqjS53z4K4cynY4KQAhdkZ6
Drop me a pm with the transaction I.D and your shipping info and I will get it shipped same/next working day depending on the time payment is recieved.
Thanks,
kilo17