Not counting the S2 case and x6500 spacers;

$2    velcro
$900 Sapphire 380 x5 ($180 each)
$39   ADATA 120gb ssd
$18   Kingston 4GB ram
$65   ASRock H81 Pro BTC mobo
$48   Intel Celeron G1840
$4     ATX power switch
$140  EVGA GQ-1000 psu
$35    Pcie usb risers 5x ($7 each)

$1251 total uses 922 watts and produces 100 MH