I have been trying to purchase the SP-30 6TH/s miner and have actually written with Gadi a few times, then,, poof, vanished. Now the SP-30's are 4.5TH/s and we have been trying to figure out the difference but cannot reach anyone at Spondoolies-tech.
The 6TH/s SP-30's are vapour-ware as I understand it. The 4.5TH/s version
actually exists.