He's referring to the efficiency, not the fact that there's two units.
At 1TH an SP10 pulls about 800W from the wall. That's about the best you can do with it, and that's closer to .8W/GH, not .58. If you run it at full tilt at 1.4TH you're pulling about 1300W from the wall, which is about .93W/GH.
What you're quoting are best case on chip numbers. That's like saying an S5 does .34W/GH because that's the best they can do with lower voltage not including any of the supporting hardware around it.
I agree with you but the specification I got them from the site of spoondolies, you can check, I will not fool anyone
I know where you got it, it's straight from SPTech's specs page. I'm just saying what these machines are actually capable of in the real world and that's what Tupsu was referring to.
I'd edit the listing, personally. Otherwise you may just get someone who buys it, mines with it for a month or two, and then returns it for "not as described/inaccurate description" and eBay will side with them and force a return on you.
I usually prefer to list known actual real-world power consumption figures rather than manufacturer specs, just makes life easier and whoever buys from me knows what to really expect if they happen to not be as familiar with the hardware as I am. I don't think you're trying to be intentionally deceptive.