i might be interested in all of them at 150 btc delivered in the US.  The problem i see id that there is new hardware announced and coming out like Bitmain S7 and the sfards 1.7 th with scrypt mining at less than 1000 watts.  I understand if you cannot, will not affect me 1 bit.  btw- escrow with a reputable person is a must-- other option is send by COD with UPS - they still have that service available.

cheers