Black Arrow is currently selling the Minion as low as $1.99/Ghash
The Prospero (X-1) machine features a compact and stackable design, out of the box functionality, ethernet connectivity and friendly UI with a performance of 64 Ghash/second.
The Prospero (X-3) machine is designed for high performance mining, is fully rack-able and presents out of the box functionality, ethernet connectivity and friendly UI with a performance of 1300 Ghash/second.
Black Arrow Ltd are currently offering a 25% discount on all preorders paid in September and October. The sales price (after applying the advertised discount of 25%) for a Prospero X-1 is $239 and for Prospero X-3 is $3999.
Let's see.
X-1:
$239 / 64 GH/s = 3.73
Not $1.99 per GH/s.
X-3:
$3999 / 1344 GH/s = 2.97 (1344 is from the specification; X-3 should have 21 ASICs 64 GH/s each)
Still not $1.99.
Chips:
$169 / 64 GH/s = 2.64
But there is a discount:
Black Arrow Ltd will continue their customer reward scheme by offering the owners of the Lancelot mining devices from the previous line, the chance to upgrade to the Prospero line by returning their products in exchange for a further $300 discount [2].
[2] Lancelot machines credit can be used against up to 30% of the amount on pre-orders or against up to 50% of the amount on orders. This credit has no cash value.
$2.97 - 30% = 2.079 (2.0828 exactly, but quite close)
$.64 - 30% = 1.85
However counting the discount is not fair. One would say BFL Single SC 60 GH/s was $699 because of FPGA upgrade.
Where Black Arrow took the $1.99/GH/s from?